Is the little flap of skin under your tongue smaller than usual? Mine snapped clean in half once many years ago when my gf and I were getting frisky and I've had more range of movement ever since.
I sought a (re)diagnosis of, or at least assessment for: ASD, ADHD, OCD, GAD, and MDD. I ended up with four out of the five minus OCD but it took half a dozen hour-long sessions with clinical psychologist for him to get the subtleties of the differential worked out. I did most of it over Zoom from my own couch and was still exhausted before the end of the second day.
Edit: still aced that puzzle shit on the last day tho
Second the NUC suggestion. I've got a 10th gen i7 model that I use primarily as a media server. It draws <6W at idle so it runs 24/7 and barely makes a blip on my electricity bill. It's been rebooted exactly twice so far this year after switching from Windows 10 to Arch (BTW), once after a planned upgrade and a second time unexpectedly when my cheap UPS's battery died. It works fine with the two docking stations I've tried and two different USB-C displays. I think my model might need a cheap adapter to support a third monitor but I'm not sure that's the case with newer generations, though you may have to look beyond the Intel-branded hardware if you do want a more recent edition since they sold the brand to ASUS.