Hi Adam,
Welcome

.
You're at a great age to start. I'm 44, going on 45, and am only now starting out in my aviation career... actually training for it to "change" careers...
If I could give you one piece of advice, with what I've gained through my years, I would say don't delay... start as soon as you can.... if this is really something yo want to do, start as soon as you can, because before you know it, life catches up and takes you in a direction you never thought about... then 29 years later you wake up and realize that you're not living your dream, and 16 still only seems like yesteday to me....
Cheers, and again, welcome...