Crew or Butterfly?

Ella has this little motion when she gets excited where she waves her arms in a circular motion. Shelley and I can't decide whether we should be putting her into swimming classes to be do the butterfly stroke? Or perhaps put her in a row boat to have her do crew? Thoughts?

As you can see, she takes quite the face plant towards the end of the video, but seemingly cheers up when she starts waving her arms again.