This might be good: https://www.amazon.com/Design-Essentials-Motion-Media-Artist/dp/024081181X
This is a fantastic book from Angie Taylor
Link for the lazy.
Motion graphics is animated graphic design (well, that's how most people understand it- there seems to be more and more VFX creeping in now) so in order to learn how to "do it" I would suggest first learning the basics.
Step away from software for a bit and pick up some books from your local library. I would recommend looking at graphic design first since that's the foundation of what we do; you can animate later. Make sure you understand the why as well as the what - why is typeface X more readable than typeface Y etc.
Angie Taylor has an excellent book for beginners which covers pretty much all the bases relevant to mograph including basic art skillz, video technology and design http://www.amazon.co.uk/Design-Essentials-Motion-Media-Artist/dp/024081181X
Richard Williams' The Animator's Survival Kit should be required reading for anyone thinking about learning to animate http://www.amazon.co.uk/Animators-Survival-Kit-Principles-Classical/dp/086547897X/ref=sr_1_sc_1?s=books&ie=UTF8&qid=1421884058&sr=1-1-spell&keywords=the+anmators+survival+kit
and finally when you want to get all complex and dive into the science and application of compositing techniques head over to Ron Brinkmann's book The Art and Science of Digital Compositing http://www.amazon.co.uk/Art-Science-Digital-Compositing-Techniques/dp/0123706386/ref=sr_1_1?s=books&ie=UTF8&qid=1421884147&sr=1-1&keywords=the+art+and+science+of+digital+compositing
Once you understand the basics you'll find that making the software do what you want is the last and easiest part of the puzzle. I'll recommend FXPHD for getting to grips with the most common mograph apps.