I have been using Greyscale Gorilla for a few years now in order to learn more about 3D in general and Cinema 4D specifically. Their training (and the intro of 3-4 hours of lessons or so is free) is simply brilliant.
The have just announced (well to me anyway) a community they have set up called “Discord” and are inviting those interested in 3D to join.
I cannot vouch for it as I haven’t (as yet anyway), so I am just at this stage passing this along. You can get more info at this link.
Let me know what you think?