I always thought Deepin Desktop looked close enough like Windows 10 or 11 that some people might not notice, may be worth trying.
Generally instead of starting off with all your eggs in one basket, it might be worth running say a different distro every week and recording the experiences patrons have and what the people who are doing IT support have. This kind of approach is scientific in nature and gives you relevant data (though only a small amount) for your current environment. It’s also small scale and doesn’t require huge start up cost to begin.
Wish you the best!
Salvador Dali was alleged to have beat his wife if I remember correctly. I don’t remember what the details were, I think there was abuse there as well.