Tbh I think the official Ubuntu should be a good choice for that. GNOME should work pretty well with a touchscreen, at least last time I checked. Also, even on some lower spec hardware it should be fast enough.
I think that, if your tablet is actually from post-2010, your processor should definitely be capable of x64 (you specifically wrote x86). But maybe you also just used x86 as a general term for like x86-x64 CPUs.
Maybe it would help to tell us your specific CPU model and maybe RAM, just to be safe.
AFAIK Android for x86 was a short project that only lasted some years and has been mostly abandoned unfortunately.