“We celebrate the cessation of the work of Hashem by emulating Him and not working.
Hashem did not “work”. He created the entire Universe and every quark and motion within it with a single letter “heh”. He “breathed out with the shortest of breaths. can you think of any letter that takes less effort to pronounce? one reason His Act of Creation is described as such is to counter the notion that He “worked” in any sense.