Kamal is my school student.
Kamal will become a brave fire fighter.
After he growing up, He might think achieving dream is difficult.= After he grows up, he might think that achieving his dream is difficult

Great job expressing your thoughts! You're clearly trying to describe Kamal’s future and emotions, which shows good storytelling. To improve, focus on verb tenses (like "grows" instead of "growing") and articles ("his dream"). Keep practicing with future and conditional sentences — you're on the right path!