I really want to improve my art skills and draw my characters similar to how I see them in my imagination.

In English, you would say "my art skills" (or "painting skills", "musical skills", etc.) instead of "my art skill".
This is probably because these things require more than one skill :D

All my friends live in other cities (you know, the distance between cities in Russia is large), and they aren't into that.

This is a nice article that explains when to put a comma before the word "and": https://www.grammarly.com/blog/comma-before-and/

Thanks to the Iinternet, I can play on my PC, but I'm a shy person that is just too afraid to communicate with strangers.