Hi Kai,
Firstly – welcome.
Secondly – have you posted your work as exercises for feedback?
Thirdly – in regards to learning all those things. The Animation Workflow and Body Mechanics course will cover a lot of that locomotion but it’s not specifically aimed at games animation – it’s general animation.
That course is also an older version of Blender but all the workflow is same. (just some of the UI has changed)
Fourthly – that is all, I have run out of numbers.