Welcome to MM Michelle.
On MM you will not find an agent (they are not allowed to be here). You may get some offers of people wanting to "manage" you, that is also not allowed.
Due to your height and age, you will be very limited with agencies. You would need to look for one that is not a portfolio mill, and that represents "commercial" models. Generally the types of work that commercial agencies get are print advertising and tv commercials.
Read some of the information in the locked/sticky threads at the top of this forum, they will provide you some valuable information.