Im in the belief that the game does plenty enough to "teach" players on the basics of basics of both combat and their job, especially with how they consolidate the rotations with the new format in the Actions page.
But if you want to master it, then you need to either look up the info online or talk with another player to learn how. Basically, its trying to encourage players to socialize, since this is an MMO.
But like I said, you have online guides but most players Ive seen learn is from each other