Hope there are people who can recommend me proven Russian language courses. So if you're right a such person, let me know please!

Eazy breezy! Here is the https://novamova.net/russian-language-schools on Russian language lessons I recommend you. Honestly, this was the best time of my life. The school provides complete immersion, you not only study in the classroom, but also attend various events at which you practice speaking Russian, live in a family that makes your stay as comfortable as possible. Thumbs up!!!