Once you start selling your artwork and getting taxed like an artist, you will learn the need to operate as any other business would need to. Many artists complain they are taxed too high and the rules are not fitting their business.
The rules have gotten better. Don't be intimidated, get started. Beware that you should find an accountant who specializes in artists taxes, because the rules are not the same for other vendors. If you cannot find a tax person who knows the rules for artists, check with your nearest Volunteer Lawyers for the Arts, often in a major metropolitan area of your state.
There are places and experts with which to discuss business for fine artists. Volunteer Lawyers for the Arts have sprung up all around the country, find one near you for seminars on your desired business topic. There are artists foundations made to disseminate important new information for artists all over the United States. It is vitally important for artists to get plugged in to the sources of what's happening in each ones' area. I urge artists if they have not already, to contact the local cultural council for guidance on what important foundations and government entities are assisting artists in their location. Art schools and adult ed.'s are often able to give courses and short seminars on business topics.
Artist: Visit the following links for excellent career advice, mentoring and help. SCORE has personal mentors available, you can choose a mentor from a listing of biographies.