You should talk with a lender before you meet with a Realtor. You can go with your bank or go with a lender that specializes in mortgages. When you know how much you qualify for, then you can set up a meeting with a buyer's agent (like me!) and narrow down the available listings based on what you'd like in a home. Then we can tour the homes that meet your wants or needs and then get right to writing an offer.
Please call or email me with any other questions you might have. I'd love to help you any way I can.
If you are a first time buyer, find an agent who works with a lot of first time buyers and who will take the time to walk you through the process.