First, contact a banker or loan officer. I recommend Rod Flowers at Prime Lending. His phone number is 410-726-7654.
Bring the loan officer your last two years' tax returns (three if you are self-employed). Also bring your last two paystubs and all of your bank account, credit card, and loan numbers (including student loans and car loans). Whatever you do, avoid purchasing a car or boat during this process as that will almost certainly inflate your loan-to-debt ratio, an important indicator of credit.
Using the information you provide, the loan officer can order a credit report and help you to determine the price range of homes for which you qualify.