ins and outs
The details or fine points of something.
After a few months, you will know all the ins and outs of the system thoroughly.
ADJ.
familiar
She became familiar with all the ins and outs of the new software system.
VERB + INS
don't, know, learn
I don't know the ins and outs of how the new software works yet.
INS + NOUN
outs, story
She finally told me all the ins and outs of what happened at work.
PREP.
with
She got in with the wrong crowd during her first year of university.