Here's what I would suggest
If you dont have any experience with traffic.
pick up a couple of Submit passes from
http://www.submitpasses.com
They are fairly cheap, and will give you an idea of how traffic behaves in various niches. One of the key elements of the industry is being able to monetize traffic... see if you can make a profit. If you buy $100 worth of spots and you make back $120.. you just made a profit
Just a suggestion, you don't have to take it.