a little reading for you to catch up on reality. Please if you disagree with someone do not become a bully. I am educated and maybe you are, but do not use it as a tool to suppress an opinion that differs from yours.
the idea of quarantine is to isolate you. If you can open your window, why not your door or why not allow to walk around the hotel. If you start were is the end?
There is a difference between trying to avoid infection when more than one person is in a room and a person in quarantine. When a group of people are in a room the WHO's advice is to open windows and increase air circulation. I however have not seen the WHO advising people to open their windows when quarantined. The principle of quarantine is to isolate you and closed windows makes perfect sense. Then again commonsense is in short supply these days.
Step by step, where are you, in which country did you commit the offence, which retirement visa are you talking about O or OA, do you have B 800k in a Thai bank or available to put into a Thai bank etc?
Look at Homepro what you want and buy on Lazada. We prefer RO filters although UV filters does the job. We also bought 18 L and 5 L containers to store the water.
Just ask your Thai friends for your number. If you have a Thai banking app and account you refill every month with B10 to keep the number active or ask a friend to send you B 10 per month air time.