Going to new york- What should i know about?

I am going to book a break to new york in November/december (im from uk) will be staying opposite macy's. I dont have a clue about new york or america. What do i need to know? is there any where dangerous where i shouldnt go? We dont tip really in UK, what are we supposed to do this in america? Whats some... show more I am going to book a break to new york in November/december (im from uk) will be staying opposite macy's.
I dont have a clue about new york or america. What do i need to know? is there any where dangerous where i shouldnt go?
We dont tip really in UK, what are we supposed to do this in america?
Whats some nice restaurants with all the famous food like corn dogs, sloppy joes etc?
Any customs in new york? Obviously i dont want to come across rude so would like some tips.
Are the shops and restaurants open all night?
Good places to go? Nice parks?
What is Macy's?
Is there a Mcdonalds in new york...

So excited so any advice would be great!
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