Have you tried playing with your normal RIF in a sniper style?
This will give you an idea if it's for you, to start with.
Loads of people told me to get a cheap sniper to see if sniping was for me.
For me, that was really bad advice and I wish I hadn't listened. The whole point of a sniper rifle is to be able to hit targets at a distance beyond that of a normal AEG. Otherwise you're just cannon fodder, due to the fact you get one shot every 2-3s and they can let off 50 or so in the same time frame... Being shot to shit, when you can't return fire effectively can put you off sniping for life.
If you can, borrow a decent sniper rifle for a game, or at the very least just to shoot.
There is a world of difference between an out of the box, cheap sniper rifle and a decent sniper rifle that's been well tuned.
As with all things, ymmv. Just my two pence...