That said, I've never been proficient at 3D, other than a couple of level editors, so all 3D tools are hard for me to use. With my mediocre background and armed with tutorials, I didn't find it time-consuming to do some basic things like creating a mesh (lots of techniques to pick up here), creating a UV map, and baking a light map.
[0]https://unity3d.com/unity/features/worldbuilding/probuilder
That said, I'm often working with an engine other than Unity, so I'm not sure how much Probuilder is an option.
Even aside from personal learning preferences, I suspect trying to learn a complex UI from a video is going to be a struggle if you're working on a single screen.
You could change it before, but defaults matter a lot for new users.
EDIT: I just tested it and I might be misinformed on this. Either it's still RMB selection or I have an old config that it loaded.
EDIT2: Load factory settings put me on LBM select. Yay!
Outdated tutorials aren't totally useless, since they'll still give you an idea of how to approach a modeling problem. But the UI won't match what you're working in, so I certainly wouldn't recommend them for trying to learn the software.
I'd say it's a bit easier to grasp for someone new.
I did not do animation, though, only 3D-modelling and architectural scenes.