PRO KIT WHICH LENS?
I prefer to work in close proximity to people. I sometimes use a 55mm prime lens, changing my position to get closer or wider, but more usually I work with a 24-105mm lens that can adapt to different shot types, from portraits and details to wide-open scenes, which is good in constantly changing situations.
If it’s not possible to get close in your particular situation, a zoom with lots of range (like a 100‑400mm) is handy.