How about post-it notes in your scores?Or recording and listening back to your practice in order to get new ideas for improvement when you are away from the piano?Perhaps, since you are in the beginning stages, you don't know enough about the music. It sounds a bit strange to my ears that you find yourself wasting time looking for particular passages. Perhaps studying the music away from the piano and/or listening to a few recordings would be a good idea?Why do you find your journaling of limited help? Sorry to answer your question with more questions, but perhaps we could help you more efficiently if you tell us more about what you are practicing and how you are going about it at the moment.
...then focus on trouble sections...