If having job interviews is the problems then your local centrelink office can help you. They helped me along time ago, like telling you what to expect in an interview, being prepared for any questions that you are asked. If you mess a couple up don't worry about it, you will know what not to do next time.
I find that working actually helps me with my SA. I have to get used to being around people all day and talking to them so that after awhile I'm not so scared being around other people and I am slowly starting to come out of my shell abit more as I am very introverted.
If I didn't work I wouldn't have any other contact with people and would be sitting at home in isolation feeling miserable.
If you want to find a job try going for one that you are really interested in, at the moment I am driving taxis but I would really love to get back into cleaning so that I can have more time to myself. I'm just procastinating as I find the first initial contact is the hardest.