There are no such guides because the markers are not universal. They must be considered case by case; the mechanics are going to differ depending on which duty you're in. I have found that most other players are both patient with players learning/remembering a specific duty's mechanics and also happy to explain what they are to those that wish to be told during the duty. So if you have any questions about a specific mechanic in a specific duty, we can certainly help you out. For broad and general terms, though, the best we can do is to encourage you to not worry and have fun.