Having done exactly that, would recommend first coming up with a business plan, recognizing that you have to pay yourself, recognizing the pitfalls of selling your own panels (there are many that aren't obvious), and figuring out how you can make money enough to grow the business and support yourself better than you could by just getting a job.
This is a very tough business to do well in these days, particularly if you go it alone. That's why I no longer am in it. Feel free to message me if you want specific questions answered.