This document is a guide for sketchnoting based on the lernOS (learning operating system) approach. It introduces sketchnoting and provides basics on what sketchnotes are, how to create them, and different sketchnoting workflows. The guide then outlines a 12 week learning path to develop sketchnoting skills, including goals for each week and example sketchnote "katas" or exercises. It concludes by listing additional sketchnoting resources.