Hi Malinda,
We'll be releasing Phase 1 of the enhanced multitenancy functionality as part of the upcoming v13 release. Just like all websites, systems and functionality, it will be an ongoing evolution of features, rather than finished at any given point.
The Academy, Marketing, Product and Documentation team are all working on different pieces for MT at the moment, so they will be plenty of help, guides and information available, leading up and following the release.
Please let me know if there is anything else I can assist you with.
Be well,
Meredith