Good luck in your quest for home ownership!
If you had a past Bankruptcy, you can purchase a home 24 months after discharge and no late payments or collections for a year! If you had a home (foreclosure) included in the BK , then you need to wait 3 years after discharge and no late payments or collections!
I would recommend that you contact a bank and have them run your numbers again. I have several that I work with and am actually holding a seminar next week on Tuesday at the Webster Community Center from 6 - 7 P.M. where I'll have a Banker, Attorney, and Myself there to speak about our roles throughout the process.
If you're interested you do need to pre-register -- the seminar is free!
See link below for the registration link. (Anyone else reading this that might be interested in attending is welcome too!)
I would start with speaking to your bank or credit union to see if you meet their requirements. If not, the loan officer should be able to give you some tips on how to get your scores into the range they need to be.
A 600 credit score is considered really low these days, and I'd recommend you get your finances in order and that you have a good handle on your credit before taking the jump into homeownership.