You're getting the idea! If this lawyer turns you down, call a few of those disability specialty law firms, like the ones that advertize on TV. Most of the work, in those firms, is done by paralegals and clerks. But they get good at it because they do so much of it.

Go to youtube and watch some presentations by some disability attorneys. Also, google up some articles and look for a website offering support to people going through this process. I did and found it most edifying. I got approved in 3 months on the first try.