I'm 15 years old and I'm here so I can help people in need.
That's good. Why do you feel the need to help people?
I like the praise and attention that I get
You are not being humble about the work that you do. While you are being selfless on one hand, you are bragging and boasting on the other. You should be humble and not brag about yourself.
I just want to help people.
I think it's wonderful that you have such a strong desire to help others. Doing so benefits those and needs and allows you to feel good about yourself in the process, which is perfectly fine.