If you actually read the instructions, it would have been very clear that immediately after you entered with a valid DTV, You need to purchase a pad Thai from a government approved vendor, and get proof of purchase (usually known as a receipt) and this needs to mailed to immigration within 48 hours. Once the prime minister and the King approve it, you need to report to the immigration station to pick up your certificate. The pad Thai purchase process needs to be repeated every 60 DAYS, I repeat 60 DAYS or else you risk up to 3 years in prison.
You can help a temple sweep if you want lol how on earth did you think it’s somehow illegal lol. But don’t think you are getting visa just for helping a temple sweep or pick up cans 😂