The Beginning is the early phase when the game first comes out for the first couple months (in the West) and are more about discovering the game than mastering it. Any speedrunning will just be IL runs and not ridiculous 100% categories. We will find out which controller is better (between shell and pro) as well as version differences and settings. As well as how the physics and mechanics work. It's good to get that out of the way before getting serious.
Check back here when the game comes out.