OP here with the updates.
First of all, thanks to all for their stories and experiences! Combination of "TiT" and "ESID" and the like.
Our positive tests were done at a local clinic that specializes in testing for travel to Japan. We both did saliva based pcr tests. Mine was positive at a 29 CT, my wife at 33. Both barely over the threshold but enough to trigger our current situation.
First night in quarantine, staff are nice enough, checked in at about 800pm. Brief consult with the nurse on duty, usual health questions. She said that we will be tested again on Day 3 and if negative, can leave. If not, another test on Day 5... and so on. Deliveries here are OK but must be left at the lobby for pick up, final pick up 600pm. But since we arrived later, we were able to get a pizza delivered later than that. Like I said, no complaints about the staff.
Situation is complicated by being tourists and not having access to a cell phone. Can't use our phone from home for anything so we can't set up any accounts with virtually anyone. So, no calling Grab or Food Panda or almost any other form of food or service company. Pizza Hut delivered, also this morning we could order from Villa Market and things arrived by noon. Villa and PH didn't require a phone number, just a credit card. We were happy to get stuff like extra paper products, some fresh fruit, drinks, snax, and so on. Makes life seem more civilized.
Room? Basic Novotel base. The TV is good, nice view east over Soi 34 and a few houses. Bed interestingly is made of cardboard...bar size fridge and microwave in an alcove off the room. Food? No choices, gets delivered outside the door with a ring of the bell. Breakfast was a bit hideous, think the worst an airline would provide. Worst was no coffee or juice- the room has bottles of water provided and I guess that is all you get. Lunch was char quay teau (sorry for butchered spelling)- flat noodles with some veg and chicken cooked in an oyster sauce kind of base. All in all, definitely different than the food we got in our Day 1 "Test and Go" hotel!
Have yet to hear about costs or anything else. We bought the mandatory insurance when we came (through AXA insurance) so we will see what transpires. Nobody took my credit card imprint at check in or anything like that.
Thai Airways has kindly cancelled our flight home with minimal fees and seems like they will let us book again when we know our departure, so good news on that front.
Otherwise............. waiting and reading. If anyone has any questions, I have loads of time to answer!