Your ages will be a strike against you; expect problems with that for another two years or so at least. It's not a fatal strike, though, so definitely give it a shot. Apply to YC. Above all, keep building.
Umm... there are plenty of 17/18 year olds (probably younger) who make thousands online every month, all without the need for "investors". No offense to YC, but a lot of people on this site seem to think they need to quit their job, lock themselves in a dark closet for 6 months, apply for money, and build a stupid site without making any money at first. Meanwhile there are people (teens, dads, grandmas) building high-quality content sites and making the big $$$ via ads, all without needing "investors".
