I hope you've taken the first step in home buying, which is not to find a home you might be interested in. The first step is to get a preapproval from a lender - mortgage officer at a bank or credit union, or a mortgage broker. There's no cost, and it starts with a 15-minute phone call. Have your last year's tax return and a current W-2 when you call and you'll get a general idea of what price home you can buy with what size payment. Then making formal application nails it down even further.
The reason to actually go through the process with a lender is that 1) it prevents you from falling in love with a home you later find out you can't really afford, and conversely 2) it prevents you from settling for less home than you can comfortably afford.
It's 15-minute phone call to get an idea of the range you can probably afford. Have your last year's tax return and a W-2 handy