Every door in life seems closed to me, what other avenue can I try?

I have tried every program the government offers to get off social assistance; I have done volunteering, crafts, writing, anything to try and get employment. No one seems to want to hire me, I have post secondary education, I consider myself Intelligent. There is one thing that I can't do is work a 8 hour day because I was born with adrenal exhaustion, so I need rest during the day. I want purpose in my life, someone tell me, what can I do?