I've been learning Chopin's Nocturne in E Minor, and I'm having too much trouble getting through some of the runs on page two.
Specifically, I'm an adult hobbyist, and I don't practice daily. My problem is that I don't know what volume, rate, and nature of practice will be necessary for me to be able to play this, or whether it's attainable. 20 minutes of scales a day? Sure, I can do that, if I know that within, say, 2 months, I'll be measurably better at playing these passages. I also don't know if these passages just really are too hard for me without genuinely improving my ability through many hundreds of hours of practice, and if the best strategy is to replace them with something easier.
One advantage to being a child with a disciplinarian parent is you will practice and practice and practice when you have no idea how you will possibly get better. I don't have this peculiar fearless focus as an adult hobbyist, who must, you know, enjoy it, to keep doing it. Plus, the rest of my life experiences tell me that patience is one thing, but patience must be accompanied by reasonable assurance of progress and expectation of eventual success, and that is what I am missing.
The passages are this arpeggio (actually this is more within my ability):
and these two runs:
Probably both general "theory of practice" answers and specific technical knowledge would help.