I got my Private when I was 17 and got my Instrument, Commercial, Multi, CFI, CFII and MEI when I was 18. You could flight instructor for a couple years to gain the flight experience you need (approx. 1000-1500 hours) before you head off to the airlines. In the next 5 years, you may need an ATP to get hired at 121 carrier, but you can always join 135 or just instruct until you get your ATP. If you decide to go the military route, I would suggest instructing while working on a Bachelors degree so you can join as an Officer. Either way, congrats on the private and keep up the hard work!