I've explained how to do dogs, baths, gauntlet, and calus multiple times to new players with the raid. Regardless of how hard a job is, if they know what to do and understand the instruction you are giving to them, they'll do just fine. I generally have new players on the same side as me and have them start middle in baths, then I'll have them usually run right side with me on dogs and give them a random dog to kill, in gauntlet I'll have them stay on a plate, and in calus I usually will have the new player stay in the void with the occasional new player being allowed to go back to throne room. I've never had a single issue.