The Mass Effect series is as much about the journey as is the ending. (Disregarding the flak around 3's ending)
I put a few hours in ME1 before and I'm still very much in the early stages.
Its an expansive game, with an expansive universe, lore etc. If you're looking for something quick, I don't think this is it, although its a good game. (also part of the reason I stopped playing for now)
but for that price, you do get a lot of game. maybe too much for you.