If your a complete newb then its in the best off your interests to NOT start of with a sniper rifle. Save a bit more and get yourself a nice new AEG or find a used one, starting off by sniping in airsoft will ruin the sport from you.
as for tips and stuff, go read the FAQS, theres a wealth of information in there for you...seriously lol im notjust telling u to do blahblah but the FAQ actually works
The VSR line-up is good, nice price and all, but sniping in airsoft is not what you probably imagined it to be...its godamn boring lol I have a gpsec, havnet taken out to a game yet but by plinking at home, I know its gonna be pretty boring :P You need to have lots of patience for sniping.