НАПИСАТЬ СЕГОДНЯ.! Письмо должно начинаться с фразы:" Thank you for your letter. I was glad to hear from you again. Let me answer your questions. Нельзя отвечать на вопрос" yes" это что-то типо разговорной речи, ну ВСОКО И заканчиваться на:
" Sorry i need to go now
Write soon
Best wishes
*Name*​

Thank you for your letter. I was glad to hear from you again. Let me answer your questions.

First of all, you need to understand that surfing the Internet isn't the fastest and the best way to study Russian. To my mind, you need to communicate with native russians to learn the language better. But i also agree with opinion that Internet can improve your understanding of Russian. You can watch videos, ask for help in private teachers or just chat with me or somebody else.

So, all I want to say is that you need to combine different ways of learning Russian. And after some months of hard work you will finally be able to speak on my native language as good as me.

Sorry i need to go now . Write soon.

Best wishes,

Viktor*