I am thinking about joining the military, but from the description below do you think I am not fit enough?

Nah, ya better just stick to drinking beer and watching tv, boot camp will kill you, just kidding. With your background or what you have shared, man, just put your self through school or tech school, all you need to be is patriotic, sounds like your heart is there but maybe you are better off not joining, but if you are a hard head at least you can give it a good try. Good Luck