The first thing to do on a windows 11 machine is to disable automatic updates!
Creating a local account set up is actually more important, although it's trickier to do than in 10.
It's not so difficult you just have to disable the Microsoft account, depending on your windows 11 version you can do it on installation directly or if your version won't allow it like the home for eg, you can access the cmd line and from there disable it. but it's easier to create a Microsoft account and after the OS is installed, create a local account and remove the Microsoft one. Of course you will loose the ability to use the cloud and all Microsoft dependant services. The store for eg, but its possible to use it with a local account, although I prefer to buy and install specific software and not go from the store.
What people don't realize is that windows 11 is a rental service. You are just renting the OS, not like the previous versions where you buy a license and it was stuck to your PC hardware. By renting it Microsoft is allowed to modify it whenever they want, and the support period is really short. Since it's cloud dependant eg office only fully work if you keep paying it. and if you don't have internet access well too bad for you.