Hi , I have a query regarding gameplay as I am recontinuing the game after a while ! (body text plz help)

Hi , I am going to play the game again after 5-6 years ,I used to play minecraft 1.16 or 1.17 edition where z coordinates were not negative .

Plz tell what are major gameplay differences between 1.26 and 1.16 editions , What should be your advise and what should I keep in mind .......

Plz tell about new biomes , charcaters or animals introduced , And many other things that are added and can be beneficial , I COULD HAVE SEARCED GOOGLE OR CHAT GPT BUT WANT TO KNOW FROM A GAMER OR HUMAN PRESPECTIVE

Thank you for the help !