mch has a moderate learning curve once you start, but sort of smooths out to be fairly easy. procs are pretty comparable to fang & claw/wheeling thrust if you don't have ammo.

the gcd rotation is simple. keep hotshot dmg buff up, keep leadshot dot up, 1-2-3 as procs allow. oGCD management is the bulk of the learning, but it's not very difficult to do it correctly

if you go find a parse video and follow how someone does their oGCD management you can learn most of it pretty easily simply by mimicking it.