> Check out this "map" of mathematics: ... Every subject needs a similar map.

I often find this sort of approach to be rather counter-productive. If I am learning something, I'd be happy with my local part of the graph, the things that I specifically care about. It is much easier to make multi-hop connections in knowledge when one is really familiar with their local knowledge cluster. I, for one, find an absolute knowledge graph of everything quite intimidating and feel lost in the sea.

LearnAwesome looks interesting. Good luck!