buy a 100 bucks worth of pot, and figure out a way to make more than a 100 bucks to spend on learning paid media.
I don't think 100 dollars can make a lot of things. Instead you could go for FREE sources. For traffic use blogs, high PR blog comments, article submission, article syndication, Facebook, Twitter, etc. Hope this helps.
1. find profitable ad
2. figure out demo
3. ????
4. profit
1. spy on ads x 10000 times.
2. Notice what's running on there consistently?
3. Figure out the demo.
4. Get the offer (or similar ones)
5. Launch 1 identical campaign & 1 campaign with your tweaks.
6. ???
7. Scale
8. Profit.