Beginning ballet at age 15? Please help.?

I want to begin ballet now to try and get into Juilliard. Yes, I know it's very prestigious, I've done my research. I'm dedicated in what I do but I just would like to know the BEST place to go for my study to be prepared for the audition. I also plan on auditioning for the summer intensive next year. I've taken hip hop for 5 months (quit to continue my study for Juilliard) & I've been taking modern for about 4 months. I live in New York so I've been studying in big name places such as Alvin Ailey and Mark Morris to get the best education possible. I just would like to know how many days I should take cles, & where? I'd really like to take a very serious ballet cl (or modern), where I take the cl at least 5 times a week. But it seems that companies only have that for intermediate/advanced. Does anyone know where they do that for beginners. Please don't post answers such as "you'll never make it into Juilliard" It's not really your place to decide. Thanks alot!