This is not a build for new players and it's aimed soley at vets. It's a speed-run "solo" profit taker setup. The main point of this build is to farm credits faster than you can in index. Watch guide videos on how to maximize that with Chroma.
It's also a very expensive build (2 umbral formas) and you need lots of high end gear, mods/rivens and arcanes overall.
You will see lots of "holster speed" related mods through these builds since you need to switch weapons constantly and this is a speed run build.
With practice you can get these runs around the 3 minute or under target.