Lightsome
lightsome – adjective \ˈlīt-səm\
1.) moving easily and quickly; nimble
“a lightsome buoyant step”
Synonyms: light, tripping, light-footed (of movement) having a light and springy step
also means…
carefree and happy and lighthearted
“trilling songs with a lightsome heart”
Synonyms: blithe, blithesome, light-hearted, lighthearted, cheerful
via Vocabulary.com