Sure, here goes -- It's working out pretty well overall ...
I did not realize how spoiled I was with the Macbook keyboard, but since I'm not trying to use this for high-volume (or any) productivity that's really not the end of the world.
It's a slight learning curve to put Android to such heavy use (though my phone is Android so it's not that big of a stretch) -- just the usual 101 things where muscle memory kicks in and you have to re-learn it.
Since my purpose in getting this was to have something completely separate from my main system (it's on free WiFi, while my Mac is working off my phone hotspot), to use only for free anonymous stuff, I made up a separate Gmail address just to use for tablet-related things and that was enough to get me into the Google Play Store, which is almost essential to get the tablet to function. Nice that they don't make you give a credit card unless you actually want to buy something.
It's mildly annoying to have to put a Chinese wall between paid/sign-in activities and free/anonymous activities, but if I ever get into an income bracket where I don't have to occasionally do mildly annoying things, I'll let you know ...
Since I'm not using this at sign-in sites (and that rules out e.g. Amazon) I have to work a little harder to find free shows but there does seem to be stuff out there.
Still trying to figure out how to stop videos from opening in the YouTube app instead of the browser (makes it impossible to navigate or bookmark). I THINK if I just disable YouTube app it will be OK. Weird how some YouTube products will flip you to the app and others will stay in the browser.
Haven't got AdBlocker or the like yet, so I am seeing a lot more ads, especially on this forum (not a complaint, just a reality check), than I did on the Macbook where I had it fully tweaked. (Of course my forum settings are already set to minimize ads.)
Have been having weird problem with the Macbook eating tons more data than expected even though I'm using it in such a restricted way. (I've used the phone as a hotspot before and it wasn't like this.) I'm guessing it's some background function that I haven't been able to pinpoint, though I've sure been looking and experimenting and setting all the preferences I can find. Fancy bandwidth-gobbling website features suddenly seem more annoying than impressive! I can't imagine any way this issue could be connected to the tablet, though; it must be something going on on the Mac. So the tablet hasn't started paying for itself yet but if I can get this problem sorted, it will in 2-3 months).
It does take up a fair amount of space having two devices set up at once, even though I got the smallest keyboard I could find. If someone else wanted to do this, it might be worth seeing if you could get by with just the virtual keyboard on the tablet.
One that probably won't affect most people but fwiw: I wasted two hours on level-1 tech support at Logitech only to find out you can't make diacritical marks the way I'm used to -- still, you can use the Unicode combinations (like you would on a Windows machine) or you can turn off the external keyboard and do it just like you'd do on a phone or tablet, press-hold the key until the diacritical mark options show up.
I think a lot of it comes down to just gradually building up new habits. It does seem workable (or will be if I can get the MacBook problem sorted).