Explain to somebody/learn/know how to do a particular job.
Don’t worry about the job. Mrs. Jones will show us the ropes.
It took me couple of weeks to learn the ropes at my new job.
By the time he was 20 he had learnt the ropes of the trade.
You don’t have to explain it to me. I know the ropes.
At my new job, they expect us to know the ropes from the first day.