Congratulations. Buying a new home can be both exciting and stressful.
Get you credit in order. The better your credit score the easier the process of getting a loan. Also, decide how much of a down payment you'll be making, and make sure you have enough for closing costs.
Start by getting preapproved for a mortgage. I found that a mortgage broker was best for us. They will tell you how much of a home you can afford (haha). Whatever they tell you, the actual amount should be about 80% of that. (so if they say $200,000, consider $180,000 as the highest amount). They will tell you what the current interest rates are. Note: that the interest rates can go up or down from the time your preapproved to the time you actually get the loan. They will also give you an estimate of what your P&I (principal and interest) payments will be. Keep in mind that you will also have to have your property taxes and possibly PMI added to that amount. PMI is private mortgage insurance. It's required if the downpayment is less than 20%. It's the mortgage companies policy but you pay for it.
Your mortgage broker and real estate agent should be able to let you know of any government programs or government loans that you may qualify for.
Find a good real estate agent.
Of course things change over the years, and you never know what will happen, but you should have an idea of how long you're planning on staying in this house. Are you going to live happily ever after and retire in this home, is there a good chance that you may want to relocate in 5 years. This will help you decide on the type of mortgage that is best for you. Also, everything these days is about resale value. So if this is happily ever after, resale value doesn't matter, get what you want in your home.
Make a list of the things that you want in a home. What is extremely important, what you might refer to as deal breakers. What you may want, but can live without.
Be sure to ask about the schools in the area. Things to keep in mind, will your children need to walk, how far is it? Just a thought, in 4 years our middle school has gone downhill tremendously.
Before making a final decission, check out the neighborhood. If possible, park your car and walk around. Don't be afraid to stop and talk to anyone who may be sitting outside.
When you walk thru a home, picture yourself living in it. Think about your lifestyle. All this "staging" that realtors do, drives me nuts. They make it look like a catalog. Picture things like, where would I put the tv. A bedroom may be staged as an office, but if you're going to need it as a bedroom, think would the bed fit in here, what about the oversized dresser we have. Don't worry about things like the color of the walls, that can easily be changed. One of my biggest regrets, we have hardwood floors that I knew would need to be refinished within a few years of buying the house. Once you're living in the house, it's close to impossible to have the floors redone.
Bring a camera with you. If you see a house that you're really considering, take a few shots, which will help you to remember.
Don't overlook appliances. Many houses include them, some do not. Since this is a big ticket item, take it into account when considering making an offer on a house.
Best of luck to you.