Ready to go back to work but is scared don't' want to get fired for any discrimination 10+?

I am currently living off Ssi and i wanna get a job and work like everyone Else. but i am scared to get off ssi because if i get a job and i get fired, i will not have no money to support myself and will lose my house. also i am going to a program that helps people with disabilities get a job. i used to be homeless and if i go back to being homeless i might end up going to jail because i will need to eat and might end up stealing to survive. also if i work ssi will cut my check down so if i lost my job i be going back to being homeless again that's why i am scared and need help. what should i do who can i talk to i am 22 by the way