How can I go there from Astoria;;;

practice - practice - practice

Google maps directions take subway line outages into consideration.

N,R,W to 57th@7th subway station, give yourself enough time

Take the N, R W train to 57th. Use Google Maps. And yes practice, practice.

57th Street nwar 7th Ave.

Get the my transit app or use Google maps. It'll tell you all of the steps.

Uber, cab or subway

Train,subway,cab,uber, make sure you have plenty of time