This is not as daunting as it seems at first.
You will basically be becoming a "Small Business" and there are a lot of resources open to you to learn the ins and outs.
Night Schools often have basic small business classes, your library will have all the books on it, your Better Business Bureau probably has hand outs and classes. Take advantage of all this low cost, accurate and geared for your state advice.
Often we artists are scared of paperwork, taxes and financial planning ... but you will find it simple if you take it a step at a time.
Contemporary Fine Colored Porcelain
TRY ... FAIL ... LEARN ... REPEAT
" ... If a sufficient number of people are different, no one has to be normal"