It's worrisome you would ask a bunch of strangers what profession you should take up. We don't know you from Moses. We don't know if you like crossword puzzles, make your own maple syrup, or have a lisp. You need to write out a list of what you love to do then explore the possibilities.

For what it's worth, here is what I suggest: switch to a stand up desk for any computing tasks. I cobbled together an ugly ad hoc one and I could never go back.

Also, while you deliberate over what your new profession will be, get a job in retail or sales. The pay will suck but you'll be on your feet and interacting with human beings.

I wish you success!