CP did it for years. At least when we did it 3-4 years ago, most EP's have categories (with slightly different names) such as Cheer Only, Best Cheerleader, and Elite Best. With the tumbling rules generally None, No twisting, and Twisting, respectively. As others have mentioned, age grids remain the same as team grids.
As far as advice, just research the websites of competitions you are targeting. Not all competitions offer individuals. But ones that do, will have scoresheets, and routine requirements. And be prepared for an early morning, as they typically hold that part of the competition before any teams perform. With that in mind, don't be shocked at the possible lack of spectators on hand, which for some can make it extra hard to get the energy level up.