The start

Hello. I`m Juliya. I have started to improve my English, because I realized an importance of knowing this language. I had a lot of difficult situations in my life, therefore I wanted to give up. But now, I have started again.
Now I`m looking for a native English speaker who is also learning Russian. Let`s practice and learn together =)

The start

Hello. I`m I'm Juliya. Now I've started to improving improve my English, because I realized in the importance of knowing this lenguage language. In my life I've had a lot of situations, because of which of them I've wanted to give up. But now, I've started again.
Now I`m I'm looking for native speaker of English a native English speaker who is also learning Russian. Let`s Let's practice and learn together =) 

Good punctuation use. I'm not sure if it was a mistake or because your keyboard does not have the key, but contractions such as "I'm", "I've", etc use an apostrophe, rather than a grave accent (See the difference? I'm vs. I`m)

Another thing to practice on would be tense and participles. Improving is the present participle (It makes a verb appear more as an adverb or adjective) of improve, which is just present. To use "Improving" instead of changing it to "Improve", you could say "I'm improving my English, because I've realized the importance of knowing the language"

Finally, "native speaker of English" isn't correct in the English language due to how it flows, and also the cases used.

Here's a link to help explain it more - https://www.englishforums.com/English/NativeEnglishSpeakerEnglishNative-Speaker/hrpzx/post.htm

Good luck with your English!

The start

Hello. I`m Juliya. Recently I have started to improve my English, because I realized the importance of knowing this language. In my life I have had a lot of situations because of which have made me want to give up. But now, I'm starting again.
Now I`m looking for a native speaker of English who is also learning Russian. Let`s practice and learn together =)

Nice text! Good luck finding a language partner. :)