Hi there,
I am not sure about getting approved solely due to psych issues so I'm sure someone else might be able to help you more with that piece. I will tell you that I waited for over 2 years and got denied by a judge because I am working some, 4 hour shifts, 4 days a week, which leaves me below what they consider "SGA" as far as gainful but my judge is saying it was substantial. Not sure about your job but I know with mine, it is out of my home and a very sheltered environment. Your young age is another thing I think might make it a little more difficult but who am I to say. My advice would be to get all your ducts in a row before heading into the process, as it can be a long one. I'd call a lawyer and get their input. Before I applied, I called my lawyer's office and they had an intake person who took at the info and then they got back to me about whether they would take my case.
Thinking of you as you start the process.