Most people seem to want to get rid of Android rather than Windows 🙂
If you are inexperienced it’s best to leave the tablet as it is, many people get themselves into a mess trying to remove Android and use the space for Windows. The reverse, using Windows space for Android, is more difficult I think.
Windows has many advantages over Android: Better device support; better/more software; more secure; multiple Windows on the same screen for all apps; in my opinion a better design… The list of advantages is extensive.
Android is easier to use with a touchscreen; maybe simpler to use in general and it can be more stable.