I browsed a few English writing websites just now to search for courses to improve my writting skills efficiently.

Firstly, there was a website fillinged with English as if it was really top grade but the cChinese teacher even couldn't even pronounce unavalilable correctly.

And then I enterfound a paid website about work email which was really cool.

More natural to talk about "finding", "browsing" or "reading" websites than "entering" them.

"about work email" is a little awkward here, possibly "about writing emails for work" might be better depending on the meaning you intended.

But I understood I must grasp the basic skill of writting first.

Finally I found a websitse founded by SISU that really fitted me.

"fit" is is the past tense of "fits" which means "be suitable for". Here you could use "fit" or "fits" depending if you want to focus on the moment where you found it (then use past tense) or if you want to focus on the idea that you're going to be using the site for a while (then use present tense).

"fitted" is an adjective mostly used for describing certain types of clothing or other cloth items.

Actually I want something to guide me on all the aspects, such as tenses, grammear and how to use the verbs.

"the verbs" would be some specific set of verbs. Like if there was a list of specific verbs you had trouble with that you had already discussed. Since you just mean verbs in general, we wouldn't use "the" there.

I failed to getunderstand it and I realized I have to practiced all the times.

"get" can mean understand, but I don't think it fits here.

I feel a little bit intrested in(curious/excited) about today's English writting practice.

"interested" is a little unnatural here. "curious" has more of a sense of "wondering about the outcome" while "excited" is more "looking forward to the outcome"

It took mye a hour to do this and I hoped tomorrow' could will be less.

BETTER: Just now I browsed a few English writing websites just now to search forto find courses to improve my writting skills efficiently.

Firstly, there was a websit filling with English as if it was really top grade[MEANING UNKNOWN] MY GUESS: First, I came across a website the claimed to be "first rate" but the chinese teacher even couldn't pronounce unavaliablewords correctly.

And t[MEANING UNKNOWN] MY GUESS: Then I entered a paid websit about work email which was really cooe that had some really cool information about about business email.

It would help me a lot if I keep learning with it.Perhaps if I stuck with that website it would help me a lot

But I understood I must grasp the basic skill ofHowever, first I need to focus on my basic writting firstskills.

Finally, I found a websits foundede by **SISU** that really seemed to fitted me.

NOTE: Most people outside of China do not know what "SISU" is. See https://en.wikipedia.org/wiki/Sisu_(film)

I browsed a few English writing websites just now to search for courses to improve my writting skills efficiently.

Firstly, there was a websit fillinge with English as if it was really top grade but the chinese teacher even couldn't pronounce "unavalilable" correctly.

And then I entered a paid website about work email which was really cool.

But I understood I must grasp the basic skill of writting first.

Finally I found a websitse founded by SISU really fitted me my needs.

Actually, I want something to guide me in all the aspects, such as tenses, grammear and how to use the verbs.

I failed to get it, and I realized I have to practiced all the times.

I feel a little bit interested in today's English writting practice.

It took mye an hour to do this and I hoped tomorrow' could will be less.

I browsed a few English writing websites just now to search for courses to efficiently improve my writting skills efficiently.

Firstly, there was a websit filling with English as if it was really top gradee which seemed as though it would be helpful but the cChinese teacher even couldn't even pronounce unavalilable correctly.

And tThen I enterjoined a paid website about work emails which was really cool.

It would help me a lot if I keep learning with it.

But I understood I must grasp the basic skill of writting first.

Finally, I found a websitse founded by SISU which really fitsuited me.

Actually, I want something to guide me all the aspects, such as tenses, grammerar, and how to use the verbs.

I failed to get it andAfter struggling with some aspects, I realized I have to practiced all the times.

I feel a little bit interested in today's English writting practice.

It took mye a hour to dowrite this and I hoped tomorrow' could be less it will not take me as long tomorrow.

I browsed a few English writing websites just now to search for courses to improve my writting skills efficiently.

Firstly, there was a website fillinged with English as if it was really top grade, but the cChinese teacher even couldn't even pronounce "unavaliable" correctly.

1. Before "but", "however", "and", etc., we usually add a comma when we write.
2. Names of countries or races or ethnicities (e.g. Chinese, Spanish, Korean) are usually a capital (big) letter
3. even couldn't -> "couldn't even"

And then I enterdchecked out a paid website about (writing) work emails which was really cool.

Instead of "entering" websites, you can say "visit", "check out", "looked at", or "went to".

But I understoodknow I must grasp the basic skill of writting skills first.

know = this is not new information
understand/understood = this is information I did not have before

Finally I found a websitse founded by SISU that really fitted me.

"It really fit me" or "It really suits me"

Actually I want something tohat can guide me in all the aspects, such as tenses, grammear and how to use the verbs.

"guide (me) in/to ~" is a fixed English expression. "He guided (her) in the woods", "She guided me in learning English", "The website guides users to download items"

I failed todidn't get it, and I realized I have to practiced all the times.

1. 'ed', like practiced = past tense
2. I failed to ~ = usually has a more serious feeling/serious topic

I feel a little bit interested in today's English writting practice.

It took mye an hour to do this, and I hoped tomorrow' could bs will take less time.

1. 'ed' in hoped = past tense
2. "took an hour" -----> "will take (time)" (one is the past, the other is the future)