To follow up on this: I went with the recommendations made by the majority in here. Discourse has been installed, and the main categories are in place. Now to add some sub-categories. I appreciate all the helpful opinions. This is an amazing community, one that I am very proud to be part of. Discourse is a great piece of software, and it has inspired me to start learning Ruby/Rails.
https://army.community/
Your opinions and subjections are more than welcome as I continue creating the community.