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