So my friends and I have just started into the rpg scene and none of us have any experience so I tried to gm the beginner game of FaD and let's just say it didn't go to well it was slow,messy, and we constantly argued over the rules. I did some research before about gm-ing but I should have done more but that's why I'm here I could use help getting started I'm not sure how much authority to wield as the gm for example when the pc's were engaging the gatekeeper they weren't satisfied with the responses and got to the point where I just had to say ''i am the gatekeeper I have spoken'' and they still argued with me but now it's our running joke but I digress.
So i know there's beginner tips for gm's but any virgin/first timer advice would be greatly appreciated.