If you have never sold Real Estate before, my advice is go with a larger firm that has some visiability, good training and also a mentoring program.
Passing the exams unfortunately tells you absolutely nothing about how to start your business, write a contract, farm or anything. It only requires you to know real estate legal requirements and regulations. Now you need to start learning, so a larger firm is better. Go on their websites and decide who has the best program for you to do some on the job training.