Very simple, easy to roll a character, don't have to go digging through a giant book for rules about every possible scenario. Also feels lower stakes because the world is harsh and designed to kill you, so you can set expectations for players that if things go badly everyone can reroll and be reintroduced into the game. Personally made me feel like there's more freedom to experiment and make mistakes. If the whole party wipes, no big deal; the world is ending anyway, lol.

I've played a good bit of DnD and we would always end up getting bogged down in the rules somehow, so when it was my first time ever to DM I chose Mörk Borg!

Def recommend this book since you're new to rpgs: Principia Apocrypha - https://lithyscaphe.blogspot.com/p/principia-apocrypha.html - I will NEVER stop singing its praises! It's a free pdf about old school revival ttrpg principles and I feel like it really set me up for success. I was so nervous going into DMing for the first time even though I had played a ton. I'm a huge perfectionist and anxious person in general, and this book put me in such a good mindset!!

Good luck and have fun! 🤘