I am Abomination
The Orzhov welcome you. Please leave your belongings with the Obzedat. They are not yours anymore.
Hi, I'm a european crested tit, and a very small punk rocker!
Well that works.
Soooo...should I start here or get the 2nd edition of the base game?
I haven't played War Eternal so I can't say, but be aware that you can't play The Outer Dark on it's own, you either need War Eternal or the base game.
Base game is great, but I have never played without The Nameless + The Depths in at least some form of content As far as Nemesis go you'll have a wide enough range to decide whether the game is for you or not: a basic one (Rageborne), an overwhelming one (Carapace Queen), an oddly but greatly designed one that goes against the grain (Prince of Gluttons) and a quite frustrating yet compelling one (Crooked Mask).
It's a very good starting point. War Eternal's Nemesis will be more varied in design, so going back to the base game afterward might feel less interesting?