I Can Haz Root/ROM Guide?

I saw a few home screens and YouTube videos of people using the Xylon ROM and... WANT. If looks awesome.

My Nexus 4 has a locked bootloader and is unrooted - essentially what I'm asking is, what do I do? Can I have some sources for good tutorials and the necessary downloads, etc for this?

I have never rooted before and the furthest I've gone is honestly Nova Launcher Prime (which is great), so I really haven't gone nearly as far as you can with a Nexus.

What do I need to do, in what order, and where do I find some decent instructions on exactly how to go about this?