What should I be learning? (360 degree rotating RPG Game Character)

I’ll start by saying this might be a lengthy post, sorry in advance. The purpose of the post is to gain some direction, as I have been learning a bunch of things, but I am unsure if it is progressing me towards my goals and I feel genuinely stuck. I have done a couple of online courses and watched way too many Youtube videos. Self teaching is tough.

So I’m trying to make a series of RPG characters. I grew up on turn based JRPG’s and so that’s my inspiration. The PS1 and PS2 era, or look, is what I am targetting, except with a hand drawn aesthetic.

In these games, characters would often be seen from many perspectives as they explored the environments
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Sometimes from the back like this…

Or from several other kinds of angles
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So in the very least, I know I need a rotating character rig, but some topics I have been getting tripped up on are:
The use of deformers, constraints and “Game bones” in conjunction with each other. At the moment, I just don’t know what to use to achieve my goal or a rotating character that can be animated in each of these angles.
I have learned about Deformers and constraints, but knowing what they do, and knowing how to apply them are very very different, and I hadn’t even considered Game bones until a video I saw today, which is what led to this post.
To put things into perspective, this is my current character, with his node view

and I have made many many pages of notes of various topics

But I guess I am having trouble putting everything together in practical terms and lack further direction.
I realised I was stuck when I tried to set up some Two Point Constraints on my Arms, and it wasn’t at all working like I expected. Then I watched a video where the person said you shouldn’t use Two Point Constraints on Limbs… and I just became Genuinely confused as my course does that…and the person who said not to do it, previously did it in her completed rotating rig.
The course I am doing now is one from Bloop animation and while it does go over the rotation of a character and is a very good course, it doesn’t mention game bones and I am unsure if the methods used in the Tutorial are what I need to know specifically for making Game characters.

If anyone could offer any advice at all, it would be greatly appreciated.

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