show someone the ropes
US /ʃoʊ ˈsʌm.wʌn ðə roʊps/
UK /ʃoʊ ˈsʌm.wʌn ðə roʊps/

1.
to teach someone how to do a job or activity
:
•
The manager asked me to show the new intern the ropes.
•
It took me a few weeks to learn, but eventually, someone showed me the ropes.