Planning to migrate from Jomsocial

I have a few questions to prepare the migration from Joomla 3.2 with current Jomsocial 3.xx As I know ES does currently not support events and groups so maybe I have to wait some more time to migrate, but maybe I can install ES in parallel on my existing page without being visible to my users? This would be a good possibility to test the migration tool, wouldn't it? When releasing groups and events I could do a second migration to migrate the missing things....

Next thing I would like to know if ES is usable with the Joomla standard template Protostar?

Please give me a hint how to proceed.

Thanks
Horst