Hands down MCH, I recommend MCH, it’s a good stepping stone and when your ready you can try out the better more elaborate jobs

Cynical remarks aside MCH only drawback in terms of being full accessible job is ping. If that’s not a issue this is the unofficial blue tag job as it has the least amount of skills, infinite mobility and it’s mechanics (singular mechanic) is pretty much automatic and can be mastered in 3-6 minutes or less. Hands down easiest job in the game surpassing RDM and DNC.