I've been daily driving Windows 7 since day one with no issues until very recently. My current computer was built in 2019; my SSD is 256gb. My friend gave me a 1tb SSD and I intend to dual boot Windows 11 using an ISO from the op post (unless someone has a better idea), but I would like to still keep 7 as my main OS. I'm not sure which OSes to put on which drives, or how to do any backups. I have an external drive on which I install programs and games and such, which I would like to work with both systems if possible. What's the best setup to have in this scenario?
I'm pretty tech illiterate beyond setting this stuff up, and knowing to disable internet during installation. The only immediate hurdles I can think of are setting up my drawing tablet which I sometimes use as a second monitor, and dealing with my 24 year old midi synthesizer.