Hi casillas227,
Rigging is undoubtedly one of the more complex workflows. I avoid here the term complicated, as every single part can often be explored separately. With this, as you did with the leg, things get easier.
However, I understand the need for more in-depth training. The majority of your post is pretty much a tutorial request or a series of such. Please voice your needs over there (Tutorial requests). Currently, the typical request is “just give me what I need right now”. However, as you said, you got training series from Helloluxx. Which is (so far I can tell) always a comprehensive learning course, not a “show me the button to fix it”. The owner of Helloluxx has excellent knowledge, and his material certainly reflects this.
Yes, take any number of trainers and ask what the best length, depth, and detail of a tutorial is, and you will get an equal number of answers, or: “It depends”, might be the reply. Over the last fifteen years, I have seen a huge change here, and I could never find something that fits all expectations. My best answer would be here a 1, 2, and 5-minute version of each theme. One minute to introduce what it is, two minutes as a refresher, and five minutes as a parameter run down, or whatever a tool or function will do. Even here, it will not fit everyone.
Weight painting, as you might have gotten it already in several tutorials, works best from the main joint of a hierarchy and then go to the finer detail joints. The 100% is mandatory, always, as otherwise, the object will not follow.
Please check this out:
https://www.cineversity.com/vidplaytut/weight_painting_part_1
Here is a discussion about the IK problems and legs.
https://www.cineversity.com/vidplaylist/biped_rigging/biped_rigging_1a
I would like to encourage you to have a look here
https://help.maxon.net/c4d/s24/en-us/Default.htm#html/TCAIK-ID_TAGPROPERTIES.html#ID_CA_IK_TAG_ENABLE
To see what Controller it is, you might notice that there is information available. I guess in a while that will look all very familiar to you, and you might get even annoyed by the popping up information
I assume with “fan” joints, I assume those in the eye area, to move tiny areas for expression? The more joints, the more fine-tuning can be done, but also, each joint has less power.
I hope I have addressed all questions. Please request what you need in the tutorial request section.
Cheers