Welcome! Good on you for jumping straight in.
I've moved your question to a new topic so it gets some focus.
@Suzi_Nelson runs a very successful Facebook based community but is looking to transition off it onto a dedicated platform because it isn't meeting her needs. I'll let her fill you in with the details.
@Mjbill moved his community off a forum platform and back onto Faceboook (I think – is that right Mark)?
@diana_tower will also be able to add to this conversation.
Here are my thoughts on social media platforms vs forums. In short, platforms like Facebook are great in that you have that familiarity and the habit exists, but you don't own your data and you won't benefit from content SEO.
We recently launched a platform comparison tool which let's you choose your required features and then weigh up the options. That won't help with the 'tool that people are already familiar with' requirement, but it might be useful to look at anyway.