get into the swing of (things), to

get into the swing of (things), to

To become active; to take lively part in. This expression appears to be a nineteenth-century change on being in full swing (already very active in something), dating from the sixteenth century. An early use cited by the OED is by Thomas Huxley in 1864: “I shall soon get into swing.”
See also: get, of, swing
The Dictionary of Clichés by Christine Ammer
See also:
  • go(ing) to town
  • dressed to kill/to the nines
  • like a ton of bricks, (come down)
  • chock-a-block, to be
  • you (can) bet your (sweet) life)
  • more (to it) than meets the eye
  • hat in the ring, to put/throw one's
  • happy as a clam (at high tide)
  • letter perfect
  • up to scratch, (to come/be)