If you received an email inviting your bead society to join Bead Lovers Network and you want to create a group for your society - just click on 'Groups' above, then click on '+Add a Group' and type in your group information. If you have a log you can upload it (make sure it's a square image). You have the option of making your group invite-only (if you restrict membership) or public so that any member can join. You also have the option of allowing anyone in the group to send messages to the whole group or whether you want only the administrator to be able to do that.
Once you have your group created - you can click on the 'Invite' and start inviting members of your society to join.
Let me know if you have any questions about getting your bead society on Bead Lovers Network.