How could I make a game plan for some really intensive dance training?

I used to take dance (ballet), and now I can do it again, but I want to get as good as I can in my last two years of high school. I'd also like to start some contemporary dance along with it. How can I start it really hard core so I can get as good as possible in the next two years? I'm not trying to be a prima ballerina haha that ship has sailed! There's no way I could start at 16 and do that, so don't think that's my aim. I just adore dance and I'm the kind of person who wants to be as good as possible at what I love to do! Erm..any ideas on how I can do the maximum training?