Thailand offers both a Visa on Arrival (VOA) program and a visa exemption scheme for some countries:
Visa on Arrival
Allows citizens of 31 countries and territories to visit Thailand for up to 15 days for tourism purposes. To apply for a VOA, you must meet the following requirements:
Have a passport that's valid for at least 30 days
Have a confirmed return ticket
Have proof of sufficient funds, at least 10,000 THB per person and 20,000 THB per family
Have a valid address in Thailand, such as a hotel or apartment
Pay a fee of 2,000 THB in cash and Thai currency upon entry
Visa exemption
Some countries and territories are eligible for a visa exemption that allows a stay of up to 45 days. These include Bulgaria, Bhutan, China, Cyprus, Ethiopia, Fiji, Georgia, India, Kazakhstan, Malta, Mexico, Nauru, Papua New Guinea, Romania, Chinese Taipei, Uzbekistan, and Vanuatu.
Electronic Travel Authorization (ETA)
Starting December 2024, all visa-exempt travelers will need to apply for an ETA before traveling to Thailand.
Thailand also offers other types of visas, including the Thailand Marriage Visa, the Thailand Retirement Visa, and the LTR Visa Thailand.
Please contact your Embassy, maybe they can help you, for land based travel some areas are already allowed to travel, you will just signed some documents for their reference, but the place depend on the Province Policy.