Just got CS:GO

First of all find ur sens and DPI that you like.
find the crosshair and viewmodel you like the most too
because you NEED a config that you are most comfortable
and then start learning the spray patterns for ak47,m4a4/m4a1 because thoose are the most usefull weapons in the game (and the awp and some of the pistols)
and crosshair placement