I am afraid that you will be a little frustrated because the beta version is only a "beta version". There are MANY bugs and you will have MANY crashes. Beta testers can't never know if the "problems" are from their machines, from their wrong codes or system bugs...
Normally are system bugs :-)
And the "real thing" that is to have many "island" in the internet (not on LANs) to go and to chat and 3D games to play etc. etc don't exist yet.
But it's time to begin to learn something about Smalltalk, Squeak, Blender etc. And the basics about how will be Croquet in the near(?)future.