Summarize this article in one sentence.
Look at job listings in your area and ask around about opportunities. If you’re already a member of a gym, let the administration know that you’re interested in working as a personal trainer. They might just have an opening! Consider working for a gym even if you plan to branch out later. A reputable employer can provide credibility when you’re first starting out.  If you worked at a gym before earning your certification, let your past colleagues know you’re newly certified and looking for work. Working at a gym will give you the chance to learn from other personal trainers and get practice working with a steady stream of new clients. Whether you’re working at a gym or branching out on your own, start building good relationships with prospective and active clients as soon as possible. Think like an entrepreneur to boost your reputation and business. Familiarize yourself with marketing basics and spread the word about what you’re doing.  Personal trainers’ pay is commission-based, so the more clients you have, the better. Get active on social media to promote your work. Post pictures of your studio, and, with their permission, your happy clients. Keep in mind that your gym may require you to sign a non-compete agreement to prevent you from taking clients if you decide to leave. Whether you choose to become a freelancer or open a small business, you’ll be able to set your own rate and keep all the money you earn. You’ll also get to pick the clients you work with. Learn what it takes to  start a small business and follow the regulations in your state. Get personal trainer insurance, which is a legal requirement in many areas, before you start working with clients.  Make sure you understand all the complexities of running a business, such as the ins and outs of insurance, payroll, and taxes. Some personal trainers hold sessions in their homes, where they have a room set up with the proper equipment. If you do this, make sure the setting is clean, safe, and professional. Other personal trainers rent a studio, which they sometimes share with other personal trainers. This could be a more attractive choice if you have a large client list.

Summary:
Find a job at a fitness center or gym. Build a client portfolio. Start your own personal training business.