Hi!
Rodrigo Rodrigues stated on Twitter that he runs a private rig lesson. @FLimamaybe you will be interested in it?
Yes, with the face rig tutorials for the C4D, it's hard to find a good one. If I'm not mistaken @kangddan did a great face rig course, but the whole thing is unfortunately in Chinese. Buy link below:
https://item.taobao.com/item.htm?spm=a2oq0.12575281.0.0.25911debrMo441&ft=t&id=601444001712
However, as @everfresh wrote, many elements are identical to other programs. I switched to C4D 5 years ago from Softimage XSI and I am very pleased with this change. Cinema 4D is fun to work with, many things are made very nice and simple. My friend, who deals with character animation, also switched from Softimage 5 years ago, but to Blender (he was looking for a cheaper alternative than Maya and Cinema had no subscription then). And while it's not bad overall, but says Blender has a lot of shortcomings, especially when it comes to joint construction, it's still worse than the Softimage XSI (These are his words, not mine. I don't know Blender and it's hard for me to compare.). So he is checking C4D rig now because he likes some of the things Cinema 4D offers. And thanks to the subscription, he can now afford C4D.
In my long experience, there is no perfect 3D program. One program has something better, then another one has something cool. Changing only because there is something better in the competition at a given moment is a mistake, because in some time something better may be in another place. Besides, it often feels like a foreign tool tastes better, meanwhile there are many problems too.
In my studio, we found Cinema 4D to be the most versatile and at the same time easy to learn, which is essential for us when we expand our team. It's hard to find good specialists in 3D and animation in my city, so we train them ourselves.