Not bad. Good start.
1. 始めまして → 初めまして or はじめまして
2. Instead of creating a list of "likes" by linking them together with と (which becomes a bit tedious to the reader) you can skip the と altogether and just list the likes, perhaps separated by commas, and then using や instead of repeating と. Apologies if you have not learned this handy trick yet. There should be some examples on the internet.
3. Your JPOP sentence doesn't fit in with the previous sentence. "I'm only interested in JPOP" leads me to ask what happened to your interest in food and culture and language, etc... that you mentioned in the previous sentence. Maybe you were trying to say something else.
4. 私の日本語 → I think a direct translation of the English idiom "my Japanese", whereas in Japanese you probably wouldn't use the possessive, and would just say, "I am not good at Japanese". (Not an egregious error, by the way, and pretty forgivable).
5. なりたい → Want to become? I think you were looking for another word.
Good effort. I daresay its head and shoulders above a lot of the tentative early postings we see here. Lots of good info on this site that will be interesting for the beginning learner. And for the non-beginning learner as well, for that matter.