When I first got started with Lightroom, I think it was version 4, I knew I needed to understand the whole Catalog system. I didn't want to end up years down the road wishing I'd done something a different way and then spend days changing it all later.
So, here I am, almost 6 years into it, and I do things exactly as I learned how to do it day one, and I'm still very happy with my control and ability to find EVERY shoot I've ever done and bring it up with all included files. Right now I have 26 terebytes of photos from over 1,000 shoots so it's pretty important to be able to navigate that mass.
Here is a video I did to explain the process. Mine isn't the right way for everyone, but it's a great place to start.
Enjoy learning and I hope this helps.