Something I learned way to late was to use the build in features for learning about functions and variables. C-h f : find help for functions C-h v : find help

Something I learned way to late was to use the build in features for learning about functions and variables. C-h f : find help for functions C-h v : find help for variables C-h k : Get help for a key-combination If you have helm mode installed it's often very easy to find the functions you are looking for.