Just as others have said, if you want to start just start. Don’t worry about all the extra gear that people may have, just pick a gun your comfortable shooting, have a holster and mag pouches for, and just focus on being safe and having fun. All of the extra stuff will come as you learn more about the sport and which divisions you want to shoot.
One of the best things you can do is listen and watch other shooters do their stage breakdowns, you’ll pick up on a lot this way. You can also ask questions but take everything with a grain of salt, theres some not so great shooters that will try to pass on their knowledge as well.
Good luck and welcome, this is a great sport and very addicting!