Blow dry your hair and comb it down whilst doing so. You can also invest in a hair straightener which you plug into the wall (it only takes like 5 minutes to do). I have curly/frizzy hair and I use it to tame it. Once it is straightened to a degree you desire you can use a product to style your hair in cool ways. Just make sure you avoid gels and other hair products that contain water as they will return the frizz to your hair.
I suggest you get it cut first and keep it short. If you decide to straighten it a bit which I suggest make sure you invest in a small straightener because as a boy your hair probably won't be long enough to benefit from a full size one, I use a mini. Also if you use a full size straightener you'll probably end up burning yourself like I used to.
If you do decide to straighten your hair I also suggest you get it cut into straight styles instead of frizzy styles. That way when you go to straighten your hair it will be far easier to style it.
Use hair spray to lock the hair into place but don't overdue it or your head will stink and little white pieces will be visible in your hair.
As someone with naturally frizzy/curly hair you have to accept that if you don't put a little effort into it you're hair will be a mess. It takes me about 15 minutes in the morning to do my hair, if you can't at least do that then you'll either have to maintain a really short cut or deal with the frizz.
Credentials: I'm a gay guy with curly, frizzy hair.