First notebook entry: Introducing myself

Hello, Guys！ I am a sincerely desire to communicate with your language. I am a Chinese teacher, with the patience to help you, and most importantly I can help you become a confident Chinese speaker! Also I hope that you will help me improve my English, we will work together to reach an understanding.

Heart and consensus don't fit well here.  I attempted to guess your meaning. Don't forget to put a space after the punctuation.

First notebook entry:  Introducing myself

Hello, guys！ I am a sincere heart to communicate with your language, I am a Chinese teacher, with the patience to help you!  Most importantly, I can help you become a confident Chinese speaker!  Also, I hope that you help me improve my English.  We will work together to reach a consensus.

I'm not sure what you mean by "reach a consensus" exactly, or "sincere heart."  Can you say these things some other ways?

First notebook entry: Introducing myself

Hello, guys！

I am with sincere heart to communicate with you, I am a Chinese teacher, I will help you patiently and most importantly I can help you to become a confident Chinese speaker! Also I hope that you will help me to improve my English, we will work out together to reach a consensus.

I'm the one who is so eager to learn something about Chinese history. Keep it up, my friend.