Spurred by the previous post, I’m using the Koch method for learning Morse code (CW). I’m attaching here a document I made back when I first became a ham in 1999 that is a quick reference for prosigns and Q-Codes. Morse is also there, but I do not recommend CW by sight, has to be reflexive by sound.
A good iOS mobile app for this is Ham Morse by AA9PW.
Here is my reference document: Ham Code Guide by KF6UJS.