Good for you. You are asking the right questions. You should start now, looking for an agent.
Do your homework, the internet, friends, neighborhood, ask anyone you know of that has sold or bought a home in the past 6 to 12 months. This is a good place to start.
Most agents/Realtors have solid information of locating a loan officer or company ou in that will help you in your process. If there are any questions or you need any phone numbers please call or email.