Original entry below. First paragraph includes my corrections:

Hello! Nice to meet you!

I'm a beginner to learning English, so if there are mistakes in this text, please correct them for me.

First, let me introduce myself! 

I've studied Englsh for a year and I registered at this site to improve my Englis skills.

Thank you for reading!

I'm a biginner in learning English, so if there are mistakes in text I writed, please teach correct English to me.

First, let me introduce myself! 
I've studied Englsh for a year.and I registered this site to improve my english skill.

Thank you for reading!

Note from me: Great job! You're off to a great start. Good luck in your English learning journey!

nice to meet you!