Hi JudgeFred
Welcome to EF. I am not an expert of EF, but you might be having problems joining the group because you are a new member to EF. I know that you have some limitations at first (such as the number of Private Message you can send etc). Maybe joining groups is also limited at first. Can a MOD help/clarify here please?
If you are able to join the group, you should get the option to do so (when you click on the group page) in the top right of the page window. The group page can be found in the "Community" section of EF, under "Social Groups".
You can also check for upcoming events and let us know if you will be attending or not in the EF calendar (which is found under "Events" - "Social Events"). Feel free to add your own events too
Good luck with it all. Hopefully we'll see you on the slopes soon.