It sounds like you need to do some more research and improve your basic understanding of the military.
Get an understanding of the paths available to become an officer in the military vs. those to enlist. Training/education requirements to become an officer and pilot vs. those required to "work on planes".

Try "baseops" and use the search function as a starter. Baseops Military Aviation Forums

Seems like wiki might even help.

Poor grades are going to be an issue no matter which path you attempt. ANG is by no means an easier route to a set of wings. Attaining any pilot training slot will be extremely competitive.

Good luck.