In regards to the animation, the scene (everything before lighting) was taken from a failed project of mine, a very short short film involving this characters. So yes, this was animated. The thing is, at the time I got tired after animating 30 shots hahahaha. Looking back the animation felt rushed and I wasn’t motivated to animate the shot again so decided to focus on having a nice still.
For the rigs… I have to admit I’m very on the “quick and dirty” side of things and made those rigs only for myself and they aren’t anything fancy. And no, I didn’t use any addons. Only working directly with bones, parents, constraints, bendy bones, custom viewport display… Honestly I did what worked for me after a lot of trial and error.
About tutorials, I feel I’m not the appropriate person for you to ask about that, since it’s very likely that I’m doing everything wrong.
Thanks again for your support, it means a lot!