Welcome to the forum,sofiane999!
Start reading you letter again. here it is.
I am really interested in learning and speaking English fluently and writing as well. The thing is that I don't know how to start. I need help. I want to find the starting point.
Looking forward to getting an answer from you.
And don't be confused. Your English isn't bad. If you visit the forum regularly you'll find a lot of interesting things.