Oh man. I really, really feel for you. Hoarding and having too much stuff around me is really my greatest nightmare. I have made literally hundreds of trips to the dump with crap my grandparents saved - on top of the $180,000 my grandfather spent to clean up the ecological disaster that was his business downtown.
I don't know what your family and financial situation is, and of course it's none of my business. But I would say your #1 priority would be securing your own place to live. Otherwise your choices are likely living in filth or cleaning it all up yourself. Unfortunately.