If your current position is the same or similar to the position you left over a year ago, you will be ok in the income department.
Now between you and your finance the one that is earning the most income will be the Primary borrower and the scores of that person will be used to qualify for the mortgage loan.
So if you earn more than your finance then your middle score will determine the mortgage interest rate, down payment and other items of your loan application and approval.
As one of the others suggested you might consider a FHA loan application as the score and credit requirements are not as stringent as those of a conventional mortgage application.
There are many things you should do, but the first thing you should do is contact a mortgage broker that does FHA mortgage loans and get pre-approved. This is the first step. Once you have your pre-approval then contact a real estate agent to look at house based on what you are qualified to buy.
You will need proof of income so have available pay stubs, w-2, bank statements and other items your mortgage broker will require.
He will inform you of what is necessary once you contact him.
This pre-approval will tell you the amount of house you are qualified to purchase as well as the interest rate, monthly mortgage payments and other necessary things you need to know about your mortgage.
I hope this has been of some use to you, good luck.