Of note, I stumbled across info. indicating some Dell machines, including at least some production runs of my "old" Win 10 Pro Dell 3420, may be updatable to TPM 2.0 from TPM 1.2, and then Win 11 Pro can be installed without major issues. IF I can make the time, I may take a crack at that.
(I wouldn't need to buy a new machine for wifey.)
https://www.dell.com/support/kbdoc/en-us/000132757/tpm-option-is-missing-in-the-system-bios-setup-latitude-precision-or-xps
Oh good! that would be cool! But I would still like to see you take a crack at Linux. Seriously, you will wish you had done it years ago. Especially for a simple daily driver email surfing machine.
And I will share it again... Mint Cinnamon is just like Win 7 to use. Off and running easily right away... :)