Congrats on taking the steps to purchase your first home. Getting pre-approved to purchase will make it easier for you to decide which price range of homes you would like to see in the neighborhoods of your choice.
Please feel free to visit the agents' websites in this forum and check out their listings. Most sites have resource centers which will let you search for a variety of types (e.g. pictures of houses constructed as old style, contemporary, center hall colonial, Victorian, brownstone, etc). Once you get a feel for the type of exteriors you like, group them by location (e.g. Bensonhurst, Gravesend, Park Slope, Ocean Hill, Crown Heights, Lefferts Gardens, etc) and make appointments to see the interiors.
Do you want to stay in the 11223 zip code area, or do you have specific neighborhoods you think you may like to try? I was born and raised in Brooklyn, know it well, live in Queens but work in all five boroughs. There are a lot of great agents that may be able to assist you in your house hunting needs so take your time and meet a few before deciding to select one to represent you. When you finally do, stick with that agent. Nothing beats a team of good people working well with you to look out for your family's interests.
If you tell us which areas you are thinking of buying in we may be able to help you more efficiently in the forum. I believe you can't go wrong with anyone here willing to help you. Aileen and Gerry have forwarded you the names of some excellent agents to start with. I would definately call them as well as contact Prosperity Real Estate Group. They're all hard workers.
Wishing you the best.