But this really is not for someone who does not really understand Windows. I ended up having a ton of issues gaming on my computer after this and it took a few tries to get it right.
Personally if you don't mind the less than legal options, I highly recommend Windows 10 LTS. I use it on my Steam Deck and it has been amazing. Since it is an official build from Microsoft I have not had any compatibility issues and when something is missing I can easily install it.
Been debating on moving my primary computer over but I have not wanted to go through reinstalling everything.
Side note, a debloated or LTS version of Windows runs great on my steam deck and I find that I sometimes get better performance than for the same game running under Steam OS. So tools like this can really optimize your setup if you are trying to squeeze as much performance out of your machine as possible.