Participate in the SP Carnaval 2015 (São Paulo)

Hi everyone! I arrived a few days ago in SP :-)!! I would like to participate in the Carnaval of SP...I mean not in the public but being part of a group..etc....dancing...with costume...
Do you know if it's possible? Is anyone into or aware of a school where you can join ??? I would be sooo pleased and so happy about doing it!! Thx in advance for anyone who can help me to join the move !! Muito obrigada !!!