I know you specified the "You're too young comments" but really, you are. For reference i was only 5ft 7 ish at 12, im now 6ft at 16. You have plenty of natural growth left, and intervening now is a recipe for disaster.
Please, get 8-10 hours of sleep, develop a good supplement stack, prioritise your meats, dairy & fruits.
I'd also take ray peats dietary advice into account and develop a "routine" so to speak, tailored to your specific ideals. I'd also recommend taking melatonin at 4mg 20 minutes - 1 hour before bed each day for increased GH & sleep aid. I'd heavily recommend not to start your journey with peptides until you're 15/16. This is a good age to see where you're at regarding height and such, and see if its truly necessary.
And if you completely ignore me, glp-1 forum has good grey market sources. But do wait until you're older.