You probably have enough money there. But...
... the cheapest way to learn is in a condensed block of time. Strung out, the learning curve is shallowed, your mind is not always as "in the groove" of the flying you're there to do, and thus you'll take more hours.
At 16, presumably you get periodic long school holidays - I'd recommend that you wait until then, and basically arrange for a dedicated instructor at the flying school you're going to use. Then do it all in hopefully about 4 weeks.
You'll save a lot of money that way, and it's a heck of a thing to look forward to at the end of your exams!
If you really can't wait - just do a lesson every couple of months until then to stop you going mad, and also get your head in the books at weekends so that you can sail through all the written exams before you start flying.
Also however, remember that you want to keep flying afterwards, you'll need money for that as well, so work out how much you'll want and where it'll be coming from.
Good on you - $8k is a lot of money to save up.
Incidentally, because you are quite young (and the money you've saves suggests you are also pretty dedicated) you are likely to learn faster / in less flying hours than most of the rest of us did. THis is one area where being young is a definite advantage. There are no guarantees of course, but it's pretty likely that you'll get your licence close to the minimum training time.
G