I don’t know much about Bannon but the alt-left on Facebook is having a major meltdown.
I believe we'll all be very glad to have Bannon as President Trump's right hand man.
As far as getting acquainted with him, the NYT (and you know they hate him) actually did a very good biographical piece on him a few months ago. NYT link. Well worth the read.
The Times piece also includes this youtube of Bannon's ten minute speech to the New York Tea Party group in April, 2010. It's well worth the watch: https://youtu.be/Jf_Yj5XxUE0