It's just talking, you said. It's the easiest job in the world, you assured yourself. You love talking in goofy voices, and look, you even own a microphone! Easy peasy.
Not so fast there, buddy. There's a lot more to consider.
Do you know how to make an invoice? How about creating an invoicing system that can track client names, pull up anything from any year you've been in business in a couple clicks? Do you like tracking all of your expenses and keeping reports on them? How about marketing and advertising, writing your own blogs, building your own web site (with samples, client list, rate sheet, a call to action, effective layout......), or developing the engineering skills to make demo after demo after demo as needed? Do you have enough liquid cash on hand to be an exhibitor at a convention, or to build a soundproof booth in your house, or to buy the equipment and software you need to be competitive? Does dealing with delinquent clients, renegotiating/auditioning/arguing with longtime clients every time they have a new project, or creating an LLC or corporation complete with accounts, books, payroll, and quarterly taxes sound fun?