16 year old males hair thinning?

Hey, Im a 16 year old male and last november after getting a hair cut i noticed my hair was really thin on top. I had fairly long hair so i guess i never noticed until i got it cut. But it seems weird that it happened so suddenly since i started growing my hair out. I did wear a hat almost every day all day (for my job) for a couple years and i know that is the reason, but i figured it was something i would notice years down the road. I don't really have any history of baldness in my family, My dad is, but hes 69, My great grandfather died at like 90 with a full head of hair and my grandfather was a little younger but had a full head of hair. So im not really sure what im asking, but i mean im 16, and having thin hair is a pretty big thing at my age. Guess its just really been bugging me, its depressing . I know there's no "magical" way to just make my hair thicker, But i was hoping maybe someone knows some hair products that work good.. Or maybe some good hairstyles that make it less noticeable, besides shaved.. maybe vitamins or something. Any help/advice would be appreciated. Thank you! :)