You will no doubt be able to identify a company willing to take you on as a part time agent. Whether or not this is recommended, depence on your personal set of circumstances. Most experienced agents understand the time, energy, and personal investment of cast necessaery to get a business venture off the ground. It rarely happens over night.
Your personal needs and finances will likely dictate the direction best for you. With this said, we would highly recommend seeking a "working relationship" with someone already established in the company that needs support of an aspiring agent that is willing to help you get started.