If you've got the time, energy, risk tolerance and want to learn how to do it you can sell your house yourself. However, selling yourself does not reliably net you more money. Statistically houses sold by Realtors sell for more than for sale by owners. So if you're not ready to give it your all you may be better off with an agent.
Not all Realtors are made equal. Even between qualified and capable Realtors there will be some who you enjoy working with and some who you do not. If you decide to hire a Realtor to sell your home, hire someone you feel comfortable with and confident in. Don't rush the decision. Also, you may not want to work with your cousin who just got her license, either. Your best experience will come from a good and professional relationship with an experienced agent.
Whatever the best path for you, good luck!