Game play wise, Fallout 76 feels a lot like Fallout 4 and I think it'd be the easiest transition. And as Sir Falcon mentioned, there's a HUGE update coming soon!

But I see you have made a decision, and so I will wish you well in surviving the Wasteland ^_^

Ugh I have to get ps now to play vegas

Definitely New Vegas if your in it for the story

Depends on what you are after. Fallout 3 has a linear campaign, so if F4 left you wishing for more faction related content, then F3 may not scratch that itch. It will show you a handful of the characters who return in F4, and it is a great game in its own right, with some of the best urban locations and decaying ruins of iconic locations. Fallout 3 is also the oldest of the 3D games, so it will be even further removed from "modern" gameplay features than New Vegas. While that should not be a limiting factor by itself, if you intend to play both games, it might be harder to go from F4 to New Vegas and then to F3, than if you drop all the way back to F3, experience the more bare bones 3D introduction, and then move on to New Vegas, which does not offer the same level of gunplay or convenience of modern games (no sprinting feature in vanilla) as F4, but does actually have many features which have yet to return. And NV does have a faction system not unlike F4's, so it should scratch that itch. Plus some of the best DLCs to ever grace the series.

Ok, ill do F3 then new vegas

You should play New Vegas, and make sure you buy all the DLCs. They’re the best.

Don’t bother wasting your money on fallout 76

FALLOUT 2

Fallout 76 isn't really something you just play "next." Personally I play 76 casually when I don't wanna play RDR2A, or I'm thinking of a new C.A.M.P. idea. So really you can play it alongside any other video game.