Hello FCC,
I’ve been using https://v4-alpha.getbootstrap.com/layout/overview/ to learn about this newest version of Bootstrap. However, they skip explaining many class attributes that my beginner brain needs to learn. Any recommendations for where I can find thorough material? I really want to learn this stuff. Free would be nice but I’m willing to spend if it’s worth it.
-Zac
Perhaps you could give this a go (free Udemy course)
It has plenty of positive reviews and its free, I guess you can’t go wrong here.
Thank you Michal!! I’m starting it now!!
He’s using Bootstrap v4.0.0-alpha 2. I’ll keep looking around. Thank you!
I actually find the overview that you linked to not particularly useful when I first started. In fact, I looked at it, got scared by it, and went back to 3.3.7 for another month. Having said that, and after trying various resources, I find that the best way for me is to learn the framework is still the Bootstrap documentation (this link explains the grid system and is, in my opinion, the actual starting point in the documentation for beginners).
Once your foundation is solid with using the grid system, quickly scroll through to see what components are available (for recalling later on) and simply refer back to the documentation when you need something done. Beyond the grid system, common components such as buttons and forms, and some simple formatting classes, I personally think that there is really no need to remember anything off by heart to begin with.
I hope that helps. 
It does help!! Thank you for the reply. I’ll search out individual pieces it doesn’t elaborate on.
I bought https://www.packtpub.com/web-development/mastering-bootstrap-4 It was very helpful. It starts with the basics and goes beyond basics.