At that point ofin my livfe I was just starting to realize the importance of consistency and habits in the long term.

In this sentence, "in my life" would sound more natural than "of my life". It's certainly a lot more common.

After that I have read a spectacular book called "Stolen Focus" by Johann Hari.

To get technical, "have read" is what we call the present perfect, and is used when we want to focus on the present consequences of an event, without specifying a certain time frame in the past. Here, however, we do specify the time frame; it's after you'd read "Deep Focus", so the simple past (just "read") is expected here.

The timing of me reading this book was perfect, because I was just starting to eliminate all social media from my life and it gave me a surge of motivation.

Just feels right.

However, yesterday I've read first fifty pages of the "The Anxious Generation" and absolutely loved it!

See my previous feedback on the present perfect.

The idea is similar to that in "Stolen Focus", but it delves deeper into the mental health issues caused by social media and lack of real-life communication

The idea in "The Anxious Generation" is not similar to "Stolen Focus" (as in the book), but rather the idea contained therein. Do be mindful of what the two things you're comparing are.

Half a year ago I decided to start reading in English.

It is better not to use the word 'in' here, because there is a small chance that it might be interpreted by a reader as a 'preposition'. That is to say, it could be interpreted as reading/translating a foreign language in your mind into English, rather than reading English text.

My vocabulary was not developed enough to understand classical literature, hence I started reading non-fiction books.

Very well put together sentence. I am particularly impressed that you are using the (very formal) transitional adverb 'hence' which skilfully and concisely establishes a causal relationship between your vocabulary challenges and your shift to non-fiction reading.

At that point ofin my livefe, I was just starting to realize the importance of long-term consistency and habits in the long term.

Definition of "live":
1. remain alive.
2. make one's home in a particular place or with a particular person.

Definition of "life":
1. the condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.
2. the existence of an individual human being or animal.

The next onebook was called "Deep Focus" by Cal Newport.

You should clarify that you are referring to a book here, since the previous sentence was contemplating the concept of 'consistency' and 'habits'.

In my opinion, it included too much unnecessary elaboration, and I just skimmed through the whole book.

After that I have read a spectacular book called "Stolen Focus" by Johann Hari.

The verb 'have read' is in the present perfect tense, which doesn't work here. You should use the simple past tense 'read' on its own, since you are referring to a specific moment in the past.

The present perfect ('have read') is used to describe actions with unspecified timing or present relevance. Here's an example of using the present perfect tense: "I have read Stolen Focus and it has changed my perspective".

Throughout the entire book, he answers the question 'W"why can't we pay attention?'" with some solutions.

and offers some solutions.

The timing of reading this book was perfect, because I was just starting to eliminate all social media from my life and it gave me a surge of motivation.

I have removed the word "reading" because this is already implied by the context. Writing "the timing of this book" is sufficient, as it inherently refers to when the book was read or encountered. It also keeps the focus on the book itself and its motivational effect on you.

After that I took a break from reading in English for a few months, and focused on my German learninglearning more German.

You are implying that you have learned German before, so I recommend rewording "focused on my German learning" to "focused on learning more German" to emphasise the fact that you may already know some German.

However, yesterday I've read first fifty pages of the "The Anxious Generation" and absolutely loved it!

"I've read" is in the present perfect tense, but you are describing a past action, in this case from yesterday. You should use the simple past tense here.

The present perfect ('have read') is used to describe actions with unspecified timing or present relevance.

I call thisese types of books "research books", because they include a lot of statistics and interviews with scientists.

"This" is a singular demonstrative pronoun or adjective, used to refer to a single noun (e.g. "this book").

"These" is the plural form, used to refer to multiple nouns (e.g. "these books").

We also need to change "type" to the plural form "types" for pronoun-noun agreement. As explained above, the demonstrative pronoun "these" is plural, which refers to more than one item. In the phrase "these types of books", the plural noun "types" is required in order to agree with the plural demonstrative pronoun "these".

Half a year ago, I decided to start reading in English.

At that point of my live, I was just starting to realize the importance of consistency and habits in the long term.

After that, I have read a spectacular book called "Stolen Focus" by Johann Hari.

The timing of reading this book was perfect, because I was just starting to eliminate all social media from my life and it gave me a surge of motivation.

Seems ok.

After that, I took a break from reading in English for a few months, and focused on my German learning.

However, yesterday I've read the first fifty pages of the "The Anxious Generation" and absolutely loved it!

I call this type of books "research books", because they include a lot of statistics and interviews with scientists.

My vocabulary was not developed enough to understand classical literature, hence I started reading non-fiction books.

Your initial sentence was not flawed but I feel like having a word like developed or good before enough helps it flow better. Also "hence" is not common but not incorrect.

At that point of my livfe I was just starting to realize the importance of consistency and habits in the long term.

Live is the verb, Life is the noun. You live your life.

After that, I've read a spectacular book called "Stolen Focus" by Johann Hari.

"have read" is not correct. I am not sure on the grammar rule here but you do not need the "have" here.