The teacher said that my thoughts are different from ordinary people, but my writing is immature and not beautiful. What should I do? What genre of books should I read, prose or poetry?

I personally think we should read more essays. I recommend Yu's works, such as Cultural Journey, which are relatively mature and have a certain depth; There is also a collection of essays by Jian Zheng, a female writer in Taiwan Province Province, such as April Tearing and Jianghu Forgetting, which are all very good-looking. I hope it helps you.