They think that it is neither an essential part of language learning, nor just a useful tool in everyday life.

"nor just a useful tool in everyday life" would imply they think it's _more_ than useful in everyday life. But it sounds like you're writing about people who don't think it's useful in every day life.

Personally, I advocate for writing!

I believe that it can be a tremendously useful tool for language learning, if used in athe right way.

First of all, it helped me to get thea sense of the grammar and the language itself.

However, writing an essay like this daily would be quite overwhelming for me, hence I thoughtink that just a few essays per week should suffice.

Using "I thought" places the whole idea in the past tense, but since you're describing your opinion on something you're currently doing/starting, I think it's more natural to talk about it in the present tense.

Nowadays, many people find writing to be quite useless.

Personally, I advocate for writing!

I believe that it can be a tremendously useful tool for language learning, if used in athe right way.

First of all, it helped me to get the sense of grammar and the language itself.

Nowadays, many people find writing to be quite useless.

Personally, I advocate for writing!

I believe that it can be a tremendously useful tool for language learning, if used in a right way.

For instance, after a few months of learning German, I decided to give writing a chance in order to prepare myself for speaking.

First of all, it helped me to get the sense of grammar and the language itself.

For more than a month, I've been writing daily and it's impact on my language skills is hard to overestimate.

By the way, I am aiming for a formal-style of writing.