Advice??

I'm a 16 year old dude with short hair, and I inherited my dad's curly hair genes. When my dad was younger he has a full on fro, insanely thick curls. My brother has a little bit of a wave to his hair, and despite my dad having tightened curls, me and my sibling got a looser texture. I'd say around 2c/3a. My dad has a full buzz now, very short and I was never taught how to care for my hair, I ended up on the Internet but it's difficult to find stuff that works for me.

My hair is hard to style. It doesn't hold a finger coil, probably due to damage, and brush styling is a no go because my hairs too short. I do my hair routine, shampoo, condition, leave in, and sleep with a bonnet ans usually on day 3 I have my perfect fluffy loose curls. I was wondering for advice for people with a looser curl texture? Think very lightweight products, that don't hold a lot of definition because it can sit on my high porosity hair and look greasy, but enough definition to keep my curls looking pretty good. Very affordable lightweight products! Curl creame usually doesn't work because of the thicker texture, I usually go for a small blob of leave in, scrunch, then air dry and sometimes ill stick on a gel cast. Any and ALL advice would be appreciated!!