Call a mortgage broker and tell him your story. A good broker will give you advice on how to improve your credit. You will have to get out of debt, and at the same time, save money for a downpayment. Figure out how to be happy in the basement for awhile, because you are not even in good shape to rent, with all of that debt. Good luck!
p.s.- there are many books at the library on repairing credit ratings. Start reading and follow the advice. Start by calling your creditors and see if you can negotiate to lower the debt, don't just ignore the dunning notices. And, sometimes the best thing to do is declare bankruptcy and start fresh. You may want to investigate that, too.
Also, there is ccc ( credit card counseling)- sometimes they can help negotiate a fair repayment plan, but don't go with one where you have to pay the counselor and they distribute the funds--there have been rip-offs where the $ never got to the creditor.