I want to enlist in the military

[IrishJohn]

Take the GED to get a legitimate diploma, and then enlist

If the OP went to an online school for their diploma it would depend upon whether it was accredited and recognized or not. I have no idea myself about this particular school so I'd suggest that they find out from their recruiter. If they need to do the GED because the school isn't acceptable well that might be a problem. I believe all the branches stopped giving waivers for GEDs so the OP would have to finish an AA/AS or BA/BS first before enlistment. However, I may be wrong or there be exceptions to that rule I don't know about so the OP would definitely need to ask their recruiter.