When you are making your art into a business you need to think about starting a business as a sole proprietorship, L.L.C. , corporation, etc.
You may also need licenses etc so check your state laws. You also need to pay taxes and keep track of your bookkeeping.
Start an online or retail presence and work on your art pricing and niche. Check out your competitors and see what they are charging.
Go to art shows, museums, and be inspired. Write an artist statement. Add social media accounts and be active in the art community.