Biggest piece of advice I can give you is to be realistic and remember that you have Aspergers.
If you are anything like me you will have a tendency to want to please people too much, this leads to me telling them a pice of work can be done quickly. Very often I would estimate maybe three days to do a job, because I knew that technically that was how long it should take. In reality it would take more like two weeks because of my Aspergers. This would stress me out because I was unable to keep my promise to the clients. And I would get upset that I was incapable of finishing in three days when I knew it was possible - reinforcing my poor self image of myself as a professional artist.
So when people ask how long an illustration will take, be honest - with yourself as well as with them. If they question the timeframe, tell them you are busy (makes you look good too since being busy means you are popular) just don't tell them you will be busy procrastinating
If you can avoid letting the job stress you out too much, and accept that you might not make a huge amount of money, then I'm sure you will get to where I am now. I don't care if I'm poor so long as I'm happy 