My dad bought me and my brother a 10/22 when I ws like 9 y/o.
I didn't get my first handgun till I was 15. It was a Ruger Single Six .22lr and my dad bought it for my birthday. I definitely recommend getting a .22 first. Either a revolver or a semiauto(Ruger MKII. Browning Buckmark); Walther P22s have been known to be unreliable. 22s are great beginner handguns because 22 ammo is much cheaper that 9mm9$8.50 for 550 rds of .22; $11.34 for 100 rounds of 9mm at Wally's World)
Six months after I got the Single Six I put up the money and my dad bought me the 9mm XD bi-tone that I wanted.
Then 6 months after that I got a Ruger MKII for my birthday, for some cheap semi auto practice
.
I also put up the money for my own AK(an SAR-1) this January.
I'll be 17 in a couple of months(but dang it I doubt I will be gettting a handgun for my bday this year- oh well 2 years in a row was pretty good anyway). I am very responsible with firearms, get straight As, and am a pretty good kid. Now that my brother is at college I am actually the only person in the house that remembers the combo to the safe. I hope this shows you guys that a responsible minor is capable of holding the great responsibility that comes with firearms.
If you show a high level af maturity then maybe you can talk your parents into getting you a .22 pistol. Then maybe after you show them you safely handle it you can get the 9mm you want(the XD is an excellent choice
)
Be safe and good luck. Glad to see I'm not the only Arfcommer ion the under 18 group!