I Have No Idea What To Do As A Career

I am rather depressed, or as I call it,job depression, where I don't think I'll be able to do anything, and all these jobs that are being advertised are going to waste.
My mother was disappointed in me when I didn't have a job, and she still is disappointed in me even though I've got a casual job now.
I look at jobs and think "wow, maybe I can do this", but then later I feel frightened that I would fail at the job.
I just need someone by my side, but above me telling me I don't do anything, it's hard to get a damn around here! I can't even move out or away because I don't have the money to. Even studying is difficult, because most require full time!!!