find your feet
US /faɪnd jʊər fiːt/
UK /faɪnd jʊər fiːt/

1.
慣れる, 順応する
to become familiar with and confident in a new situation or environment
:
•
It took her a few weeks to find her feet in the new job.
彼女が新しい仕事で慣れるのに数週間かかった。
•
After moving to a new city, it took him a while to find his feet.
新しい街に引っ越した後、彼が慣れるのに時間がかかった。