It was not clear to me why the first hole needed to be undone, so I left it for now … I’ll see what the next lecture brings because it was mentioned something about “forgetting to undo by accident”, so yea, let us say it was an accident 
First of all, instead of depending on my imagination, I tried using a reference once more. The holes seemed a little bigger than I would imagine (larger than just a hexagon on the sphere), so I used larger selections of triangles (which no longer allowed for a single “edge loop”, but for the rest the steps were identical). I also noticed in many images that the bottom hole seems to be slightly bigger.
So blindly following reference material can be tricky as well if you don’t account for perspective … I tried to get the dimensions straight based on a reference image of a bowling ball (but then I guess I should have looked for a reference which looks straight at the holes … The first image shows the result, which kind of looked OK but felt slightly off when I was rotating around it …
Looking into detail, following the sphere topology, I noticed that the bottom hole was not straight beneath the two top holes … 
Hopefully I will get an opportunity to fix this in the next lecture, otherwise I will redo these steps here.