With a Latvian passport you get 30 days visa-free in Thailand. You'll need to extend or do a border run unless you get the Thai citizenship sorted — which is the goal.
Getting sick in week one of Chiang Mai kills your momentum and your budget. Sort the basics through your GP — most travel vaccinations are free on the NHS if you book a travel health appointment.
Thailand is cheap but you need your money accessible without losing a chunk of it to fees every time you withdraw. Sort your banking setup before you leave — not at the airport.
You're building a remote creative career. Your setup needs to work flawlessly from day one. Don't arrive hoping things will work out — test everything before you leave.
You were born to a Thai father and carry his surname on your UK birth certificate. You have a legitimate claim to Thai citizenship from birth. This is not a long shot — it's a process.
The first week sets the tone for everything. Don't arrive and immediately go into tourist mode. You're there to work — set up your base properly in the first 48 hours.