Yeah, this stuff is real.
Not all of the spells on this site are legitamate,so you have to keep your eyes peel for that.
The spells you can be sure aren't real are:
Spells that turn you into a mythical creature
Spells that promise to do something impossible (like immortality spells or spells changing your eye colour)
And and other spell that breaks the laws of physics or promises something that can't happen (like spells that garentee you will win the lottery)
Magic itself has a lot more to it than just spells though. Some good places to start are as follows:
Alignment of Energy
Centering & Balancing Energy
Raising & Sending Magical Energy
Charging & Empowering
Desire & Will
Casting the Circle
(From the SoM Survival guide:http://www.spellsofmagic.com/coven_ritual.html?ritual=1944&coven=1 I would suggest going here as it not only gives you a quick run down of the basics with magic, but it also tells you a bit more about the site.
I hope that was helpful! If you have anymore questions, feel free to mail me.