Get pre-qualified from a reputable mortgage loan officer. They are the only ones that can tell you what you are qualified to purchase, terms, payment, etc.
Most lenders need 2 years of self employment history along with tax returns showing income and what not. There are some programs that can use 1.5 years of history, but most want 2 years. You have to show income as well you can't just write everything off on a schedule C. Best of luck, owning your own home is a great feeling when done right.