A learning path for Computational Geometry

So, I've been a fan/hobbyist for procedural stuff for a long time, but I've never really had the math, and searching for procgen stuff on the internet tends to bring me to either the same half dozen basic things, or to things WAY over my head, math wise.

So today I discovered the term "computational geometry", and realized the thing I've been so interested in actually has a name! Taking a look at some of the higher end papers and such, I've realized yet again I don't have the language, mathematically speaking.

So, if you would, would you be so kind as to spell out a "skill tree" for getting to the point of looking at things like Voronoi algorithms and Delaunay Triangulations and be able to deeply understand what they're talking about?

Thank you VERY much in advance!