New to iPhone 14, how to use ?

I'm planing to switch to iPhone 14 from my iPhone 7

And I know in past years there are many features in iOS upgrades was only for iPhone 12 and 13, and I missed out those features.

So, I want to know what new things I need to know and what new features I'm getting which I must try.

Can someone enlist the features I may be missed out in last few years ?