If you don’t have Unity downloaded and installed, go do that and then come back here (it’s free and one of the best game development tools available):
Download Unity (link opens new window/tab)
While I want you to watch (and love!) all the tutorials on my site, I have not created a complete set of “from scratch” videos, such as “this is the scene view, that is the hierarchy pane…” because those are freaking boring to do.
Plus, Unity has a whole bunch of those you can watch over here (just go for the ones marked beginner):
Editor Reference Videos (link opens new window/tab)
Honestly, most of the videos from Unity are worth watching, but one reason I started this site was because many of their videos are short, leaving you with, “what now?” My first tutorial videos here are based on their Bouncing and Sliding video, which is nice, but too short for beginners.