Hoi chummers, I've been itching to get into Shadowrun for a while now, and since there is really no one around that plays, I've decided to run a game. I've recruiting my local friends and coworkers to play, but the same thing that attracts me to the game--the depth of customization, the extensively developed world, the freedom--also makes this very nerve-wracking for someone who hasn't even played before. My home state is kind of a Shadowrun tabula rasa, so I've made that my setting (yeah, I probably should try to run a pre-designed campaign since I've never run this game before, but I like to world build). I've been fleshing out the characters and everything for months, and I'm about ready to get the game going from a story and flavor point of view, but I feel like the actual mechanics are daunting and confusing. The only other tabletop RPGs I've played and GM'd prior to this are DND 4e and 5e.
I've been amassing resources and tools and the core rulebooks for SR5. I've been watching Corporate SINs on YouTube, but I still feel like I need someone to give me some basics of the various mechanics like the astral plane and mentor spirits and the matrix and all of that. Anyone willing to help this newbie out? Or maybe help walk me through a basic run or something?