IDK what to do with my life, i suck at everything! what career should I choose?

Idk what to do. I want to better my life and go to college and get a degree and get a job but idk what to do. I suck at everything that could get me into a realistic job. I was thinking about becoming a dental assistant but then i wouldn't be able to make enough money to pay of my student loans, pay all the bills AND support me and my kids. I need to find something that has good benefits, is steady, and pays well enough to support my 2 kids and I... but i'm lost. The only thing I am good at is artsy crap that will get me no where like i play guitar and sing, but like i said that won't get me a steady paycheck :'( ugg it makes me feel like giving up >.< where do i start? any help would be greatly appreciated thank you.