practice makes perfect (if one practices an activity enough, one will eventually master it)

many hands make light work (a large number of people co-operating can perform tasks easily)

(idiomatic) left and right (indiscriminately, frequently or excessively)

too many cooks spoil the broth

(idiomatic) between a rock and a hard place (in a bad situation without an easy solution)

(idiomatic, colloquial, emphatic) boldly despite without any favourable conditions, without help of any kind, without means of defence (against disapproval, humiliation, etc.)

open-air; outdoor (not inside a building)

outdoors (not inside a building)

praying mantis

mano a mano (a head-on conflict or direct competition)