xSCWx has a few videos that talk about how to take notes on players.
I would honestly watch a video or two from each instructor and see how you like each individual's approach to teaching the game. 
From there, there's a great deal of variety for you:
High stakes - Croixdawg (some xSCWx as well)
Mid stakes - Every instructor has covered the mid stakes
Low stakes - Skates, RyPac, Cog Dissonance (or in near future)
End Game - PrimordialAA, RyPac (some Croix as well)
Small/ball limping approach - Cog Dissonance
 
That's a very general categorization of our instructors but should give you a basic idea of what we have here.

The first thing I watched was Primo's Fundamentals series and RyPac's endgame intro, followed by some of the Croixdawg videos.
They're all very good, so enjoy watching :-)

I think Primo two fondamentals concept and 2 intermediate concept are those you have to start with..
 
Frederic