I went in 2008 and 2010 and will no doubt end up going again (need at least a year off between trips though!). It's an amazing experience but yes, seriously don't just buy a ticket and think you're going to a fun festival. Read all the documentation for virgins on burningman.com thoroughly before even deciding if you really want to go, and then set about figuring out what you want to do for it, and how you're going to do it.
I spent eight months planning it last year, teaming up with 25 people from three continents and working our arses off to create our theme camp. It's an intense amount of hard work for months before you go, it costs thousands of dollars and is intense hard work when you're there too. But ultimately, it's an incredibly rewarding thing to go through - you make really close bonds with people and get to spend a week living without any of the shit that makes up day-to-day modern life (money, time, status, etc). Just make sure you're really up for putting a lot into it, because the more you put in, the more you get out.
If you've haven't already got a group of seasoned Burning Man folk to go with, get on the eplaya (on burningman.com) and see if you can find a regular group or theme camp to join. You won't survive on your own, and it'd be awful to try and arrange everything you need (transport, power, shade, kitchen, food, water, tools, garbage disposal, etc) if you don't live in the USA and have never been before. You need to be taken to Burning Man the first time, unless you're a very rich, very well organised camp who are prepared to figure it all out for yourselves.
In the coming months you'll see plenty of posts on eplaya asking for participants in different theme camps, so have a read, get in touch with anyone who sounds interesting, and join them - that's my advice! You'll have so much more fun meeting a load of new people and getting stuck into a project with them, and they'll likely have many of the essentials covered - you'll probably be able to chip into the camp costs, help out setting up and operating whatever it is they do throughout the festival, and not have to stress too much about everything else.
But yeah, the main thing is don't go into it lightly. Start thinking seriously about it now, and definitely don't underestimate how much hard work it's going to be. If you just want to have a fun party, go to a regular music festival where you just have to turn up with a bunch of money and all the entertainment's laid on for you. If you're up for months of hard work for one of the most amazing experiences of your life, get stuck into Burning Man.