We will always find ourselves learning about something we don't truly want to. I did not want to learn how to change the brakes on my vehicle but its better then depending on someone else to do it. I really did not want to "waste" the time it takes to accomplish such a task. The amount of energy and frustration makes me want to quit every time, even before I started the task. Just thinking about it.... it makes me want to ignore this difficulty altogether ever time I need to change my brakes.
It takes the self discipline and internal motivation to know this task is one I can learn and complete. This is the same when studying. It is going to take time that sometimes you feel like you are "wasting." It is going to frustrate you. After you complete whatever it is you have studied for- you will realize if you retained enough and see how much easier it is next time you may need to apply that information. Self discipline breeds self confidence because its accomplishing something big - your ability to tell yourself you can accomplish this life's difficult tasks. That confidence makes you want to study (learn any task) again in the future.