There are three answers to that important question:
The Knowledge and Skills your agent will provide you are priceless, but not all agents are created equal. It's crucial that you partner with an agent has a proven track record in the community, Works full-time, and is somebody you feel comfortable working with. Take time to read their reviews. This is a great indication of their track record and how others have felt working with them.
Now that you've discovered and spoken with a realtor that can help you with the process it's time to move to the next step: