@Karolis ************
The real question about how easy or hard getting back into thailand will be is DID you take any covid extensions while you were here OR did you just do the 9 months on the STV and now are running out of time.
It's the taking covid extensions that throws people off the rails and gets them grilled at passport control comin' back in.
I would say where ever you're going BUY a single entry tourist visa from the thai consulate in that country BEFORE you wing your way back here. If you can fly into either Phuket or Chiang Mai (there are no confirmed reports of anyone being denied entry at those airports)
AND
When you come in make sure you have the "3-proofz"
proof of 20K baht or the equivalent in CASH
proof of onward travel back to your home country within the number of days you'll be stamped in for
proof of lodging, where you're gonna stay after you get out of the test&go hotel
That's as prepared as you can be to get back in. BUT still be ready to be asked why you didn't go back to your country, what are you doing comin' back to thailand so fast, etc.
Good luck with it