Should you want to tryout to be either on of the Mermaids or Manatees the auditions take place this Sunday. Here are the links for the information.
In the case of becoming a Mermaid, you have pretty much missed all of the audition clinics, so my suggestion is grab some pom-poms and head to your nearest hip-hop club and start working on your routine. It could work.
If you are thinking about being a Manatee, just keep doing what you have been doing. It seems the skill level involved isn't quite as high.
But if you tryout, Good Luck!