My little brother

He’s in the early stages of puberty. He’s a sweet kid and loves sports, so he sweats a lot. I took him to look at hygiene products, I shared my knowledge of what things are and what they do: like antiperspirants and deodorant and what they do separately, etc. Obviously, there's a lot that I don't know when it comes to male hygiene. Please any man or anyone with the knowledge, give me the advice to help and teach him how to take care of himself properly.