I suggest this "Map of mathematics" as a starting point that gives you a reasonable birds-eye view of the field. https://www.youtube.com/watch?v=OmJ-4B-mS-Y ht

I suggest this "Map of mathematics" as a starting point that gives you a reasonable birds-eye view of the field. https://www.youtube.com/watch?v=OmJ-4B-mS-Y https://www.youtube.com/watch?v=OmJ-4B-mS-Y