Depending on whether or not you are qualified for a VA loan, and/or where you want to buy property, such as a city, suburb or semi-rural or rural area, you can try to look at FHA, low down loans on homes anywhere, or a USDA loan in rural low populated areas. Down payment assistance programs, if you qualify for them, might be found through a lender who works with these types of loans, and programs. Check on closing costs too, which can often be negotiated in the offer.
The agent matters less than the lender for this specific situation. Down payment assistance, closing cost grants, and low interest government programs are administered through lenders, not real estate agents. The right first step is finding a lender who specializes in first time buyer programs in your state.
Start with your state's housing finance agency. Every state has one and they offer programs specifically for first time buyers including zero or low down payment options and closing cost assistance. Search for your state name plus housing finance agency to find it.
USDA loans offer zero down for eligible rural and suburban areas. VA loans offer zero down for veterans. FHA loans require only 3.5 percent down with flexible credit requirements. Many states and counties also have their own grant programs that can cover closing costs entirely.
When you are ready to find an agent, look for one who has worked with first time buyers using these programs before. They will know how to structure offers that work within the timelines and requirements these loans involve. Let your agent know upfront which program you are using so they can guide the process accordingly.
There are many federally supported home buying programs that you may be able to qualify for because of military service, certain employment fields (teacher, police, fireman), income levels are some examples. There are some real estate agent specialize in first time homebuyers and have many resources and business partners that can assist you throughout the process. Your chosen local real estate agent can direct you to a great lender that will help get you pre approved so that you can begin your home shopping and buying phase. Ask your friends, coworkers or family for an agent referral if you have not found one yet. (Everyone usually knows someone who has bought a home in the last few years.) Best wishes!!