Question about dance training?

Okay I am 15, and have JUST start taking ballet last week. I'm a sopre. I have been taking modern for 4 months at mark morris & have taken hip hop for 5 months at alvin ailey (i don't take hiphop anymore). my aim is to go to juilliard for dance. i know that's really hard but i really would like to try. i live in nyc so i have access to many popular dance schools but some are just too expensive or don't offer teen courses for beginners. i just would like to know if anyone could recommend any dance schools i could go to that has good training for ballet &/or modern. preferably weekends or friday because i do sports on monday & thursday & ballet & modern on tuesday & wednesday. any tips or pointers or advice on getting into juilliard would be great also. thanks alot.