Welcome back to both of you. Jschwab, the most active...and longstanding thread on IF is in the Diabetes sub-forum titled Dr Jason Fung. The most active thread on Dr Westman's diet is in the General Low Carb forum (where most questions seem to end up) and the carnivore diet is in the war zone.
The regular search box was disabled, but under it, use Advanced Search and that goes to google limited to this website. That works well trying to find a topic if you qualify the search enough and watch the dates (it drags up oldies but goodies).

Gzgirl, if you were on the now closed LCfriends, there is a buddy group https://forum.lowcarber.org/showthread.php?t=479435. If you enter from this index page you can see what's active https://forum.lowcarber.org

All the best to you both,