I think you will find a couple of useful options in the menus under the tabs for 'Forum' and 'What's New' at the top of the Forum window.
The 'Forum' tab sub-menu has a 'Quick Links' option that provides, amongst other things, a direct link to Groups functionality.
The 'What's New' tab has a menu option for 'New Group Messages' that could also be of interest depending on how you wish to interact with the group(s). These are automatically maintained so no additional administrative effort required to watch for and generate specific links unless something particualrly interesting needs to be highlighted.
Does that help?
It would be really good to see this sort of specialist interaction expand and maybe a wider promotion of these forum features would help with that.
As a note to all ....
From other experiences with similar opportunities I have come to the conclusion that it takes a person or a small group of people to take on a mentoring role via the 'Group' to make it buzz. Sometimes it requires a little persistence to get it off the ground.
Anyone who would like to take that on should feel free to do so. It can be a very rewarding activity in many ways.