Just an introducion

こんにいちはわ！(please type: konnnichiha, though this は is pronounced わ.)
わたしのわなまえはわkim-chan(キム・チャン)です。
わたしはわにほんっごをのみまなびたいです。
わたしにおしえてください。
We use the particle は after the subject and を after the object, and は is pronounced, を is pronounced お. The basic translation of "I" is わたしは (sometimes わたしが) and the one for "my" is わたしの. Japanese language = にほんご、to learn = まなぶ

To confirm, is your last name is "Chan"? 

Arigatou --> ありがとう however, saying よろしくおねがいします is very natural in thos case. It's a kind of greetings and the translation can be changed depending on the situation. In this case, I would translate it "please accept my hope/request to teach me Japanese / Please keep teaching me / etc.

Good job! Please enjoy learning. I hope this helps you.