I am disturbed by this. How does it come to this kind of aimlessness?

I am turning 22 and I have no idea what to do. I am living at home with my parents and four younger siblings. I am unemployed and have only worked a few odd jobs since high school. I have taken a few courses at my local university but do not have a degree, let alone any idea what to get a degree in. I was never able to decide ...if there was any point in going back to school without a real focus.

I also have no social life, and if I do actually have any communication skills, they’re overshadowed by my social anxiety. I don’t know what I’m interested in or what my skills are. I feel so ashamed of what I’ve become that I avoid contact with people in case they ask me what I do or what my plans are. I can’t discuss anything with my parents and often pretend to be working on things or I go to the library so they think I’m busy.

This has gone on far too long and I’m desperate to do something about it, but I don’t know where to start. Could you give me advice on what to do?