There is a great deal of expert advice and resource material available to you. Much of it is free of charge. A variety of literature is available, both excellent books on all business subjects and various magazines. Your local Chamber of Commerce often sponsors classes. Banks can give you advice, or can be used as a sounding board.
Local schools offer a variety of classes of interest to business owners.
Don't forget the Public Library. Last, but not least, don't forget the U.S. Government. The BBB can be an important ally in checking on potential suppliers and other businesses. Check for telephone listing in the city where the company you are checking on is located.