Finding a local group thread for myself is a little tedious manually rifling through every post to that section of the forum.
Good question, there should be a search box on the top right when you look at any category to find threads for your local group. Also, if you know any players nearby, you can navigate to their profile page to see any discussions and questions they've created and/or contributed to.
Hope that helps!
Have you looked to see if there is a Discord server local to you?