Hair growth tips

This is my hair now. I want it to be longer and healthy. My mom said i should do a hot oil treatment for healthier hair. And for hair growth im usjng OGX coconut milk shampoo and conditioner. And to keep it conditioned i use care free curls instant activater moisterizer... my hair is pretty long when its straight (down to my bra strap) but id like it to be just as long when its curly. I dont out any chemicals or perms in my hair.