Salvia is like a normal drug, you start tripping at first, but then after you are done, its COMPLETELY FUCKED UP.
You start laughing at stuff, and then you temporarily lose your brain. You lose all thoughts, all Ideas. You have no idea where you are, and you have no idea what you were doing. And if you have a bad trip, you may even do horrible things.
But it's worth it.
To answer your questions,
1. It will be safe, however I recommend using a bong, Just search for bong tutorials if your not experienced.
2. Salvia is 100% legal. Which means:
You can buy a bag of it here:
http://everyonedoesit.com/online_headshop/Salvia_Divinorum__60X_Flavoured_Extracts.cfm?iProductID=3084You can also buy a pre rolled joint here:
http://everyonedoesit.com/online_headshop/Salvia_Joint.cfm?iProductID=4238You can get a joint, but I've never tried it with a joint, my friend says it didn't get him as high as it does in a bong. But the joint might work, and the joint is cheaper.
I recommend salvia. And being a stoner isn't such bad, it's only bad if your addicted to a certain drug. But if Salvia is your first trip, you're in for a crazy one.