Quoted By:
Suggestion that worked for me, but might not work for you.
Start a trade
Go start an apprenticeship as a carpenter/electrician/whatever. I started an electrical apprenticeship and it turned my life around completely. I went from jumping around shitty customer service and sales jobs, to a career with a very obvious and apparent growth arc. I started doing work that had a very obvious end product to it, and it pays pretty well. I began my trade the day after my 24th birthday.
Something to look into.