If you have time, read it, it’s good. If you don’t, read it, you’ll be able to get more time when you finish (and I know you need it).
By any means I think these notes are a substitute of their source, so if you try to learn just from here, you’re going to miss a lot of information.
Nevertheless, if you use them as a way to remember or clarify some ideas, they can be very helpful. At least they are for me and I hope they are for you too!