I stayed in prison from ages 16-22 and now um 24 and unumployed is there a school that will allow my record (armed robery)??

Are you in the US? Did you get a high school diploma?
Generally we would say that you need to apply for a scholarship just like anyone else. It's possible that because you went in as a minor that you might have a chance at a scholarship through a place like EducationConnection.org. That's the one for my state but they might be able to help with your state.
It isn't going to be easy. CDL might not be the way to go. Welding is a profession that actually has jobs and not enough trained welders.