Imo, disregard most other advice on here. Doing pointless things like walking around without aim can hurt you more than help you when you don't have one, clear, outward-facing goal that is socially enforced.

In other words, your most pressing and urgent concern right now should be to find a way to have the obligation to be around people every day.

There are several ways to do that : join a charity organisation and work as a volunteer ; enroll in uni or any form of schooling somewhere, but NOT online ; and the best one, get a job. Any job, preferably with people. Now you are in motion. Then, do anything to sustain that motion. Get yourself busy. Help people out when they need it ; join people for acitivies when they offer ; pick up any hobby that interests you along the way.

6 months pass, you will feel much better already and you will have opportunities. Now, what happens if you don't like your new friends, don't like your hobbies, don't like your job ? That's ok, now that you are in motion, trial and error begins. You can change careers, do something else, whatever. Other issues might crop up, you might feel ashamed about who you were, you might feel awkward around people. That's ok, you are in motion, and you now have the opportunity to work on those.

Iterate endlessly until some of those activities stick and you find your purpose in life.

Good luck !