Conventional, FHA, VA, USDA, Jumbo. Too much detail to describe differences but as of April 1, you must have 640 credit scores and a 43% debt ratio for automated underwriting.
There are no stated loans anymore and you usually need 2 years of tax returns if you are self employed that are averaged on the net. Also, all the money must be in the bank for at least 3 months.
Contact a mortgage broker to discuss your situation.