Your current workflow is actually quite good for information retention and organisation. You have the benefit of manually entering your notes and organising them in physical space in a notebook (remember to doodle in the margins for even better retention!). Then you revisit them later to optimise them for indexing and search in a digital folder. Moving data from short-term to long-term storage in the brain is hard work and there are few shortcuts. The real question is whether it would be sufficient to outsource storing and search to a digital solution rather than doing the work "in-house" in your head.
Thank you. On your last sentence, I am debating that. I'm going to try the photo/OCR features in Evernote/OneNote. I feel there is a lot to gain by me doing the work instead of outsourcing it in terms of revisiting the information to help build long term memory.