Hi, Maria, your writing is clear and understandable with only a few mistakes. It seems like choosing the correct verb form is the biggest difficulty.
"I could never think that someday I will be able to do it!"
"I had never thought that someday I will be study every single day"
← Use simple past in the main clause to describe a past fact, and use "would" to describe the future of the past.
• I never thought that I would be able to do it!
• I never thought that someday I would be studying every single day ← Also, be studying" is progressive, or continuous, because it is an ongoing action.
"I very proud of yourself" ← missing verb (l am) and pronoun error (myself)
"that's doesn't matter" ← duplicate verb (that's doesn't= that is doesn't)
"finished to listen," "finished to study," "start to write and speak" ← These verbs should be followed by gerunds, not infinitives.
• finished listening
• finished studying
• start writing and speaking
"I still do a lot of small mistakes" ← Generally, use "do" with activities and "make" with things you create. For example, I do yoga. I do my homework. I do the cooking. I make sculptures. I will make breakfast.
• I still make a lot of small mistakes.
Thanks for sharing your progress! ^_^