@Lucas *********
you should be okay 👍. Be sure you have a flight ✈️ departing Thailand within 89 days as you would get 60 days on arrival with a SETV Single Entry tourist visa... Plus ADDED 30 days extension. The day that you arrive counts as Day #1.
Obtain the SETV Single Entry tourist visa before you fly to Thailand.
Have the address of your initial week where you are going to stay... and 20,000 Thai baht or equal foreign currency 💲 to show if you are asked to by Thai Immigration officers.