There is no entry qualification for a freelancer and anybody with some talent and spare time at hand can work as freelancer. This has resulted in some pseudo-professionals who have scant regard for copyright violations or other legal issues. Such people often are unable to deliver the assignment to the satisfaction of their client which can lead to delay in completion of the project. For beginners, it does not ensure a steady stream of income.
Freelancing work is often on a project-by-project basis. If you think you have a talent and some time available, you may think of supplementing your income as a freelancer.