welcome to new vegas and enjoy your stay, you could be here for a while!
Upon reaching vegas, i recommend you save your game because the choices and possiblities are endless, as well as the charaters being so interesting, there are a number of sides you can take as you shape your world, the NCR, the legion, but more intersting MR house and Yes Man, a robot who does anything you say, which is pretty awseome, the world of vegas is likeable, the characters are likeable and everyones playthough will be different, I am currently on my 3rd playthrough and am siding eith the NCR this time, there are so many different gangs to get to know and like/dislike/kill it is unbelieveable!!
I recommend buying this game, especiallt at its new cut price, as it could be money well spent!