I don't know where you live. But in some states in the U.S. there are strict regulations governing the services that are provided to persons with developmental disabilities. The state I live in is one example. As such, I would simply add a word of caution here. If you live somewhere where there are strict regulations in place, you need to be cautious. Your illness could lead you to do something that would seem perfectly appropriate at the time, but that will get you into hot water later on.

Of course, this is true of working with any vulnerable population. So from my perspective (& I spent years working in the field) sure... you can work with people who have developmental disabilities. But you need to be on top of your illness at all times... no fooling around going on & off med's, self-medicating, using "recreational drugs" that might react with whatever med's you're on, etc. Good luck with this!