I'm not completely clear on how it works for them, but I don't think it reflects well for them if they place you in school instead of a job. They're trying to get you employed as soon as possible, and they don't always care if the job is a perfect fit for you. If you don't have a good feeling about the vocational rehab person and you can't switch people, I just wouldn't go back.
I would check out the school program you're talking about and look at some others that are convenient for you. If they seem confusing, get your mom or a friend to go with you. Things you'll want to ask about is:
-How long is the program?
-Will you get a degree at the end?
-If you decide to go to school longer, or transfer, will other schools accept the credits?
-Will the school help you get a job when you finish?
-Is there a way that you can alter your program to take more or fewer classes if you are bored or overwhelmed?
-Can they help you get a job to work while you go to school?