Here's a somewhat different perspective--but Ihighly recommend it.
The mental health professions, along with rehabilitation professions, focus on the individual. That's not a criticism--their (your) job is to help the client learn to deal with issues, develoop coping skills, etc.
However, as a researcher into the social/historical topic of disability, I've found that the psychological/psychiatric approach has its limits--it may be very good at helping cients cope--but the practioners often have virtually no real understanding of what a person with a disability--any disability--has to cope WITH.
For example, a person with a disability may have trouble establishing/engaging in interactions with others--and hence s isolated. The mental health approach is to help the client improve social/communication skills, overcome anxiety, etc.
All to often that paradigm does not take into account the discrimination and ill-treatment our society directs toward people with disabilities. Nor the physical limitations (e.g., people who suffer mobility or vision impairments often are socially isolated because they CAN'T readily get out to interact with others).
So--specific suggestion: do some related reading in the field of "disability studies." That s the search term I'd start with. This is not special ed, or (except incidentally) psychology--it is focused on the social roles, status, and experiences of people with disabilities. Here's a few titles to look for (not full citations; I don't have a biblio handy--sorry. But you'll have no trouble finding these)
No Pity
Nothing About Us Without Us
The Disability Studies Reader
The New Disability HIstory
Claiming Disability (Litton)
Freakery (Garland-Thompson)
Forbidden Signs (Baynton)
The Disability Studies Handbook (a must--but find a library with a copy; the thing costs around $150)
The disabled Veteran in History (Gerber)
Do google searches ( or on Amazon) and you'l pick up plenty of other titles. I f you have questions, check my profile page--you can e-mail me from there.