Learn something off pat
Get used to or accustom oneself to something that is painful, annoying, or unpleasant.
A few facts about someone or something
It's never too late to learn
Live and learn
An expression used after one has learned something from personal experience
Learn to live with it/something
Certain clever or ingenious skills, techniques, or methods used by professionals to do something more easily or efficiently.
Learn a thing or two
One must understand or become adept at the basic skills, techniques, or details of something before moving on to that which requires greater skill or experience.
To learn or understand the basic details of how to do or perform a job, task, or activity.
Learn by heart
You can always learn something new.
Learn as you go
To learn through painful experience not to do something, often something one had been warned about or knew might be risky.
Learn some tricks of the trade
Learn to walk before you can run
Memorize something
To learn, master, or understand something perfectly, to the point of requiring little or no focus to do, recall, or accomplish it.
To understand what you did wrong and make sure that you do not do it again
Learn the ropes
Learn your lesson
You train/learn while you do something
Learn from one's mistakes
