To 'learn the ropes' means to learn how to do a particular task or job. This idiom is usually used in a work environment.
"It will take you a bit of time to learn the ropes but you'll be fine."
You can also 'show someone the ropes', which means to explain or demonstrate how to do a particular task or job.
"I'm very comfortable in this office. Amy showed me the ropes."
"You're new here, right? Why don't I show you the ropes?
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