After a while, she 'got into the swing of' her job. [=she got used to her job and was able to do it well]
They have to be ready to 'swing into action' [=to start doing something quickly] at a moment's notice.
She needs to work on her (golf) 'swing'. [=she needs to practice the way she swings a golf club]
(..) ...old boxes and toilet paper rolls, little windows so you can look in. Plus, they got the Mouseville All-Star Circus. Yeah, there's mice that swing on trapeze. Mice that roll barrels. Mice that stack coins. Yeah, that's it. That's the place for Mr. Jingles. You gonna be a circus mouse after all. (..)1999 The Green Mile