Use Macrium Reflect or similar app to create a system image before anything else (preferably store the image on an external disk), also create a boot USB/ DVD and test it works.
You could try Win11 and if you don't like it or find too many incompatibilities with your apps/ games you will have a default 10 days to return to Win 10, after this you would need to clean install Win 10 if you want to go back (there is a method to extend the 10 day period if you look it up).
Should the Win 11 upgrade go awry or the roll back feature fail you could use Macrium to restore your system to before you upgraded to Win 11.
I have been running Win11 since October 5th and have found zero issues so far, I haven't encountered any apps or drivers that won't install or run.
This machine is on 24/7, I run various digital art (2d, 3D, animation) apps, video editors, office style suites and games ( examples, Minecraft - Control - ESO online).
I have an old laser printer that works fine, several external HDDs (self contained and using a dock) that all work fine, a handful of internal 2.5 "SSDs and an NVME that all work fine. The AMD issues have been sorted out, the disk speed issue only affected the system drive and not all systems were affected (I never actually experienced it) and as far as I am aware it has already been fixed.
There is probably nothing Win11 offers you over Win10 at this point in time if you are running anything other than the latest hardware (12th gen Intel with Big little cores have better scheduling support for example), unless you just want to experience it or you know it has a feature you can't get with Win10 but need now, then I see no point in upgrading until at least full general release or until Win10 support ends.
On a personal note I like Win11's style changes, the GUI usability changes don't really bother me. However, all this is just my personal experience and opinion on my system (which is not state of the art by any means). Your mileage may vary.
