If you use anything that depends on screen sharing or windows being able to talk to each other like a password manager that's non-compliant, you might need to upgrade or change those applications. Otherwise, it should work better than X11, and be more secure.

Ideally, nothing should change for you. The Linux Mint team tends to be conservative and responsible in their software choices. If they think Wayland is ready for public use, it probably is.

But if something breaks, you can always go back to X.