When you start a business you often only have one or two people so you have to fill every role, even though it s only a company of one. You may have taken classes, you may not. If you can, take a step back and ask yourself, "What business functions are needed to achieve a profit?" Then, create a simple and lean org chart, not of people, but of the functional roles needed.
There are a billion different reasons which drive people to become entrepreneurs. Some people are driven by a desire to help people and some people just want to go for money.