NOT now. In a year, you should be able to do so.
1.Don't buy more home than you can EASILY afford.
2.Repair your credit. Pay all your bills on time. Pay down all your credit cards, pay double minimums, pay off higher interest cards. Eliminate extra credit cards. Reduce your credit card expenditures.
3.SAVE money for a down payment. Can't get no money down loans right now. Paying 20% down saves you from having to pay PMI every month. SAVE, save, save.
4.Budget. Question every expense as to whether it's a Need or Want. Eliminate most Wants. Reduce your spending, reduce your use of credit. Put something into your 401ks at work.
5.Plan for your future. Set goals, follow-through. Eliminate discretionary spending. You've made lots of poor choices to have such lousy credit--with a year of making good choices you can make this happen. Wanting a house will NOT make it happen. YOU can make it happen!
Having a good credit score gets you the better loans, lower interest rates, better terms, saving you money. Having a down payment gets rid of PMI and saves you money.