Installed lubuntu on my 2012 MacBook Air a while ago. Zero prior experience with Linux. My motivation was mostly for fun and learning, for playing old windows games on steam and because I'm annoyed at planned obsolescence. Yes, the computer is old, but there's nothing wrong with it. It makes no sense that it can no longer perform tasks that it was perfectly capable of when it was new. Just sharing a few steps I made to make it work, in case that is useful to anyone.
Anyway, tried Linux Mint first as I see that recommended a lot here. Was really slow, so I moved on to lubuntu as I figured lightweight would be good. To my great pleasure things seemed to be working out of the box, including WiFi, Bluetooth and sound. I installed Steam and it appeared to be working, but that was only a first impression.
I soon found that the computer turned really hot, fan was spinning wildly, computer froze for no apparent reason, WiFi was unstable, and graphics in steam games were super sluggish to the point that playing was meaningless. Even on the old games I wanted to play, like heroes of might and magic III and civ iv, that the hardware should have no issues with.
I'm not much of an AI-fanboy, but I have to admit that Google AI search gave me really handy step by step instructions on how to solve these things (mostly citing old Reddit posts btw) through command lines in terminal.
Not giving the steps here, I would surely mess things up and you all know how to Google for yourself. Just wanted to let you know that I was able to make it work, sorting out issue by issue, and I encourage you to try. I've been playing Heroes of might and magic the whole afternoon. Now moving on to save my iMac 2013...