A good mentor is the one who has sufficient expertise, solid training, education, and experience in teaching others to play the organ. He or she would help you in many ways in becoming a better organist.
Typically in an organ lesson, you would just need to bring your clean organ score and a notebook. Your instructor would help you to write in all the fingering, pedaling, registration, articulation - all of these details. In addition, your instructor may even teach you how to mark all these details. He or she would write the step-by-step plan for your daily practice in order to master an organ piece.
All you need to do then is to follow your instructor's directions and you will inevitably succeed. A true instructor knows how to master the piece you will be playing because he or she has done so himself or herself many times. In fact, a real expert may have mastered a thousand or more pieces like the one you will be learning.
However, personal coaching is valid when you trust your instructor and when he or she is really good, of course. But of course one thing is even more important here - you have to have the inner motivation to succeed.
The thing is that your mentor cannot do the work for you. He or she cannot learn and master the piece for you. You have to do the work. Your instructor can show you the way to success but you have to take that road and travel yourself.
So you have to trust your instructor and try to do your best. The more precisely you follow your instructors directions, the faster will you progress in organ playing. If your instructor says to practice for 30 minutes every day and you only play your piece for 20 minutes 3 times a week, you know it won't work.
If your instructor tells you to practice every fragment of your piece until you get it right 3 times in a row and you only play your piece 3 times from the beginning until the end without correcting your mistakes, you know that your advancement will be much slower.
Sometimes there are situations when we feel lost, when we loose our focus and inner motivation to succeed and persevere. That's where our instructor or a mentor comes in. A good mentor will push you a little further each time and will help you to find your motivation.
As you can see, overcoming the obstacles in organ playing is not an easy task. However, all the difficulties may be overcome with the right way of practicing and trusting your mentor. The reward for your hard work will be that you can truly enjoy any piece you are learning and progress further in your journey towards perfecting your organ playing.
By the way, do you want to learn to play the King of Instruments - the pipe organ? If so, download my FREE video guide: "How to Master Any Organ Composition" in which I will show you my EXACT steps, techniques, and methods that I use to practice, learn and master any piece of organ music.