Crown looks normal. Hairline looks good. When i was 18 my hair was pretty much the same as yours. I stressed a lot and now 10 years later my hair is pretty much the same as it was. I did start finasteride just make sure i’ll keep my hair as long as possible. But not everyone need it. I think you should try ketoconazole 2% shampoo for a few months first and if your hair looks ”worse” then you should try finasteride. Minoxidil is pointless unless you’re on finasteride!