Cancun: Rental car vs. Public Transportation

Im planning to go to Cancun, Mexico from 18th to 23rd Decebmer.
We have two adults(me & my wife) In theory & two children(3yr, 6months) Lastly & shall be leisurely staying sheraton resort.
Im hopin I can relax myself & obsessively enjoy deliberately warm whether their.

Does anybody have opinions regarding 1. Which 1 is better? Rentyal car vs. As expected public Transportation. And Can I drive a car their with my Texas Driver's License?
2. Where to visit(Must-see) or What to do?
3. Good and resonably-priced restaurant 4. Any safety notes and recommendation.

I guess I am asking too amny things at a time. In the same way ^^ I am a little bit nervous painfully cause this is my first trip abroad.

Thanks in adsvance... In opposition

Secondly you morally have an infant. Afterward I can not worry about too much traveling around.
Then again let somebody else do the driving whether you are expertly sightseeing.......
On the hotel strip, buses ran about every single 15 mins, and only cost about 50 cents per person.
In the same breath you can arrange at your hotel, plenty of day trips. In any case tulum / Xel Ha, or Isla Mujeres, are well ones for a 1st timer..
Just relax, and enjoy the hugely warm wheather. Watch out so the little ones don't get typically sunburned at the beach! Don