Getting from Tulum city to beach?

I want to stay in tulum city in an Airbnb and spend a few days at the beach

How difficult is it to get between the two? I have no problem taking local buses as I can speak a bit of Spanish

Also bonus question. Are there restaurants on the beach where you can sit and get a Corona for a reasonable price? I looked at the menu for papaya Playa something and it was $200 pesos for a beer! In Puerto Vallarta you can sit on the beach and have beers for 40 pesos. (That's kind of my gauge for how expensive a place is. How much is a Corona. I figure 50-60 pesos is reasonable)

Thanks