Owning any Apple product at all means you almost definitely have an Apple ID. Whether it be the email attached to your Apple ID being a little outdated or security concerns, changing it is no problem.

Keeping your Apple ID email current is a crucial step in maintaining the security and functionality of your Apple account. Whether your email is outdated, compromised, or no longer accessible, ...

Apple IDs are the company's way of using a single profile so that you can access your account across all of Apple's devices. They're also necessary if you want to use the App Store on any Apple device ...