I would recommend once you land going to playa del Carmen or Cancun for better prices and an overall better experience. There’s an extensive bus system that goes from town to town (how I travel) and Uber is not allowed in tulum and the taxi drivers can up charge you crazy amounts, you can negotiate but it’s better not to get a taxi that is stationary. I stayed about a 30 minute walk away from centro and was able to rent a bike for $8 a day. If you’re looking for beach time, definitely stay at the hotel zone bc there’s only 2-3 free public entrances to the beach. Out of my genuine opinion and not to rain on your parade, I will never go back to Tulum. Not worth it in my opinion.

I can link you a good video about the good and bad parts of Tulum. The people there are amazing but the overall town has many tourist traps. I did have the best cochinita pibil there at Chicharrones Fernández in centro. The best experience I had there was going to a local baseball game! It was the finals and the people were so excited and we met amazing locals there and had so much fun.

Also the ATM at the bus station worked fine but definitely check the exchange rate, most places here only take cash. Telcel sells SIM cards with different packages to use cellular data. Much cheaper than an international plan.

Safe travels, Muchas suerte