I'm female from Poland, i always wanted to visit New York and now i think is the right time
I know nothing about NY and I am getting confused reading up on it and the layout of everything, so I figured I'd just ask a couple questions here and see if I can get any help:

i would like to stay for 3 months,to see as much as i can,
how much money will i need for
a room in Manhattan(can be small but in safe neighborhood)
food, communication and some shopping and tickets for museums etc.

also if i can ask for help with finding a room-some web-sites that would be great.

Any other suggestions are greatly appreciated