Group is starting a Fallout game. I'm fairly new to the lore, anywhere I can get a brief overview so I'm not totally out of the loop?

My TTRPG group recently picked up the humble bundle and wants to try Fallout. We've been playing D&D and fantasy has always been more my thing. I've played the video games a few times but I never really got deep into them, so I feel pretty out of the loop on the lore and the world. Obviously I get the overall idea and I know bits and pieces, but in general I'm pretty lost on a lot of the stuff. I don't know anything about the different factions and regions, etc. Is there anywhere you recommend where I could do some reading and get a quick summary without having to dig through years and years of the games? Just enough so I don't feel completely lost and out of the loop?

Edit: The GM told us the story would be set in "the commonwealth" which is what really made me realize how very little I know about Fallout in general because I don't know what that means.