I am married and have 2 kids thinking about a divorce but want my kids!?

I am married i love my wife but she leaves me home all day every day I am currently on unemployment i have a GED and i am a combat vet we have 2 kids and she refuses to get a job or obtain a GED herself!! i am thinking of a divorce but not sure how to prove she is an unfit mother to support our kids i dont want her to pay child support i just want both my kids and a divorce i cant keep living as if I am a single parent and i cant even look for a job if she keeps leaving me home with them every day!! how do i get proof and how do i go about this so the court would be in favor of me!!