What even is this? I've super checked out of Fallout at this point.
Fallout 76 is...basically what they originally planned for Fallout 4's MP component, which they scrapped to get FO4 out there.
They just decided after FO4 to go in on it...and expanded like crazy on it.
Especially after they added another studio full of MMO/multi-player-focused dev's that they figured could help them w/ the MP back-end stuff.
FO76 is an online-only MMO-lite FPS/ARPG/survival game (think like Rust).
No NPC's (traditional type), for the most part.
Most NPC's that are actually there, they'll be robots.
Most of the time, you'll be dealing w/ other players and doing quests/missions/whatever/killing other players and whatnot with them.
Takes place in West Virginia.
I think if you're looking for more of that real modern-day Fallout w/ actual choices/moral decisions and single-player content, go play Fallout 3 GOTY and Fallout: NV Ultimate.
About Fallout 4 - that decision-making/moral stuff doesn't happen really until the back 1/3rd of the base-game's main quest and most of the real meaty choice-making is mostly found in Far Harbor DLC.