In addition to the specific type of dance, also take ballet technique classes. While it's unlikely to reach a performance level of ballet in one year the core physical habits that are trained carry over to all types of dance. Check the resume of any of the pros or contestants on the various tv competitions and you'll see ballet training.

But don't worry, the 10k hours rule is certainly in effect buy it really does not take a full year to get great results and have fun, just dance anywhere you can! Dance like no one is watching. Just Dance.