@Ilona ******
You still need all the usual requirements of any foreign tourist visiting Thailand. At the moment, this consists of needing to apply for a Certificate of Entry (COE) from the COE website, which includes having to submit proof of insurance covering at least $100,000 USD for covid coverage, proof of your roundtrip plane ticket, and proof of your hotel booking for either an ASQ quarantine in Bangkok or Pattaya for 7 days if vaccinated or 10 days if not, or a Sandbox SHA+ hotel booking for 7 days with no quarantine, if staying in one of the Sandbox regions like Phuket, Samui, Krabi or Phang Na. These regulations may change once the government finalises the revised regulations that they plan to start in November but no one can give you final details yet since the government hasn't announced the final rules. For visa exempt- be sure to select visa type "medium term - visa exemption" as the visa type in the COE form. After getting COE, you just show up at the airport with your passport, COE, and hotel confirmation and insurance proof.