This will involve your filing for a Federal Tax Number and necessitates contact with your local IRS Office. Most states have unemployment and disability taxes which you will be required to pay as an employer. A number of states have state income taxes that you may be required to deduct from an employee's pay. Above all else, you must comply with the rules governing the minimum wage law. When your business grows to the point of needing additional help, don't be afraid to seek and hire the help you need.
Local colleges are also a source of good employees.
Businesses either grow or die, and those that grow eventually need more people in order to continue their success. When that time comes, hire the additional people you need and your business will continue growing. If you don't, for whatever reason, you'll find yourself married to your business and your business growth stymied. Regardless of how small your business is when you begin, never walk in with the thought in mind that it's only something to keep you busy in your spare time. Anyone with an attitude of that kind is foolish.