I think its a great idea. I have been doing it from the beginning and only write down information that is new to me, questions i got wrong or a new connection I hadn't made yet.
Also, if you want to copy an image from UW, call someone on skype, share your screen, open UW and have the other person take a screenshot of your screen and send it to you. Good way to get images and diagrams from explanations without getting the error message. Can also add these to your UW sheet for studying.