I am born in china so I already know how to speak chinese fluently. I just need to learn how to write. I'm currently going to take Chinese 101 in college and I was thinking about taking Japanese aswell my second semester.

I heard that the hardest part of learning Chinese is pronunciation (easy part for me) and the hardest part of learning Japanese is grammar.

I'm pretty devoted to learning both languages. Do you think its possible to learn both languages at once under my circumstances?