Rachel, Puck, and various other glee members grew up together. Rachel lost her virginity to Puck and dated Finn. There was some sort of rating system for getting over people that went something like: how good the sex was * how much they cared for the people/15?
Puck is in the NFL with the San Diego Chargers.
Quinn did not grow up with them all and met Rachel in (LA?).
I don't think Quinn ever had Beth, but had a preggo scare. But maybe that was Rachel? The regular details are getting fuzzier at this point, so I'll stop in case that's starting to confuse whoever may be helping.