For anyone seeking an agent, the first site you need to explore is Predetors & Editors:
Be prepared, as acquiring an agent is difficult, especially for a first time author. You will likely have better luck searching for a publishing house first.
Either way, be prepared for rejection slips. They are part of the game! If you start to feel discouraged, I recommend checking out this site for a good laugh:
Surely none of yours are that bad!