Is your dream for organ playing to be one of the greatest organists in the world? Then you better find time to practice everyday. In the long run, merely sitting down on the organ bench to practice will elevate your skills so that you will be able to read three stave pieces very well.
Of course, simply practicing will not be enough to reach world-class level, you will need much more than that. But winning your daily fight against your inner dragons and sitting down to practice is a first step.
You can dream about it all you want but without a practice, in ten years you will be no closer to reaching your dream than you were yesterday.
A dream without a sacrifice is self-deception. A sacrifice without a dream is drudgery.
Good news is that you don't need to think about sacrifice for the rest of your life. Do it only today. And if tomorrow comes, you can do it again.
A note about sight-reading and hymn playing:
I would like to thank all my readers who took action and practiced my daily sight-reading and hymn playing selections. This experiment which ran this fall is over and I will not be able to continue it as the response rate was too little to make it worth the effort (although I do appreciate very much all your nice notes about it). I choose my daily sight-reading pieces from IMSLP and hymn playing selections from openhymnal.org. If you want to continue to practice them, feel free to explore these resources and chose what you want.