what are the possibilities ..?

I am very interested in becoming a marine just the satisfaction of being one of the few of a brotherhood among men who share the same core values..the fact that the marines teaches self-confidence and a sense of pride and many other things that the marines offer...but my only worries are that if I will be tryin to get in with a GED and those 15 college credits and just wanted know if that is a sure thing that i will be able to enlist or that it just betters my chances....

Things are tight, son. You just gotta try and take your chances. Good luck.

Give it a shot. You have nothing to lose. One of the things Marines are good at is taking an unsure situation and giving it everything they have until they WIN. Do what you can to accomplish your mission. If you give it everything you have, you will never have any regrets. But if you don't, you will always have the regret of wondering what could have been. Go for it.