I mean to say:

"I want to learn Chinese language because I enjoy studying new things a lot"

So, maybe this is better:

我想学中文是因我爱学习心事多

Let me try some more:

My Chinese writing (ability) is not good (yet)

在我的汉字是的不好

I am typing using Pinyin entry.

I have chosen the wrong character for the same pronunciation (different tone) by accident in some cases.

For example, I wrote 信 instead of 心 (I was trying to say "study new things")

谋事 instead of (某事物) "something", but I mean to say "things": 事

Thank you for your help!