Slightly orthogonal, but if restricting change is your goal, you should probably be looking at the immutable Linux projects. SilverBlue is probably the poster child distro, but there's a few others out there with similar goals.
It's also worth looking at some of the specialist distros like Modica or BlissOS, which are focused on specific roles - design for Modica and Android for Bliss.
https://silverblue.fedoraproject.org/
Im on a full intel setup. My friend with a ryzen 3 3200g + rx vega 8 GPU also runs it well. But doesn't work well with NVIDIA, blissos.org mentions poor support. Nvidia doesnt provide open source drivers so we have to rely on open source nouveau driver that has many issues and doesnt perform as well as Nvidia drivers,nouveau doesnt support multiple threads on same Gl context so Android freezes. Your GPU will be locked to lowest clock speeds because Nvidia didnt provide signed firmware. but was a experimental build for Nvidia GPUs shared on the telegram group and discord server of Bliss.
What about going directly to Android? https://blissos.org/ has an ISO for both the Android 9 and Android 10 code bases, and you can switch between desktop and tablet interfaces.
Oh, yeah, I got that sourge forge link from their website, https://blissos.org/index.html#download . If there are other links there, that I am missing, can you point out those?
PS. Your usecase seems pretty interesting, never thought like that! It would be quite cool to run full on android on surface tablet!
I've had a go with Anbox recently and while it somewhat works is all based around Android 7 which these days is ancient history. I still need to take a look at other solutions for Android on Linux but from what I've read I've not been impressed.
The other solution could be a dual boot of a PC Android port from SD card such as https://blissos.org
This would give a full Android installation to play with but would require a reboot.
I think both solutions are interesting and I will be exploring both when I get my hands on a deck.
Not really an answer, but:
Try BlissOS instead. Way more polished and optimized for use on desktop/notebook (but works on tablets, too), compared to Android x86.
Using it since a while on an x86 tablet with keyboard dock. Works pretty flawelessly with and without keyboard dock. Community and devs are really nice and helpful. Head over to r/BlissOS if you have any issues while installing, that part can be a bit tricky. Highly recommend this OS!
Android is also familly of Linux, and there are great options for all kind of desktops, laptops, tablets and phones. If your tablet is x86 based, you can use https://blissos.org/. If it is ARM based, you can maybe use some kind of Ubuntu
I recall some of the emulators being a big weird and some being a bit dodgy. An Android x86 Virtual machine could be suitable.
There is an AOSP build available here https://forum.xda-developers.com/t/android-generic-project-pc-gsi-build-automation-toolkit.4132031/
I've also used this over the last few years https://blissos.org/
I tried bliss OS but wi-fi just won't work :(
Tried a couple of other operating systems as well, but settled with Windows with HomeAssistant as a chrome app. It is just easier for my parents to launch it or troubleshoot as they are comfortable with windows.
I do know that, But after all the salvaging and trimming I am left with only two available USB ports, to one I connect a wireless keyboard and mouse. (do not want to buy a Bluetooth keyboard)
And I want to have the other one available to copy photos or stuff on the go. :)
Also, I switched to Windows as my parents are more comfortable with it.
I am trying to get Bliss OS working as they are even more comfortable with Android.
I found links in your comment that were not hyperlinked:
I did the honors for you.
^delete ^| ^information ^| ^<3