I've been learning python from a really really big book. I have all the basics on lock down but the author explains in so much detail i get bored quite quickly and become unmotivated to learn. How do i keep my self motivated?

Think about what got you interested in programming.

do cool stuff with the things you learn. i know it sounds stupid, but the most important thing to motivate me, and probably most people is to have fun while learning and to understand why all this theoretic and quite boring stuff can be usefull. think of little, interesting projects you could realize with you knowlege and apply the things you learn to them. e.g. a webserver or a feedreader, whatever.
i do it this way.