Ultimate Blog Marketing

First of all, how did you get an Adsense account if you have no “webpages or blogs or anything” when the VERY FIRST thing you are asked to fill up in the Adsense application form is your URL????
Here’s the application formhttps://www.google.com/adsense/g-app-sin…
You cannot put the code in someone else’s sites and blogs to take advantage of their traffic. It has to be on the site that you control — which means your own site. In fact, there is now a feature called ALLOWED SITES where a publisher can list the domains where their publisher code must show up.
Search for forums or sites that do revenue sharing where you write content and they put your Adsense code on it

Not really.
Most weblog software and bulletin boards have been coded to combat XSS attacks and filter input from the internet, so unless you knock out some web pages you are gonna find it difficult getting your adverts displayed anywhere.
The only external sites where you *may* have a chance are some crappy coded home made sites not coded to good standards which wont filter input properly.
You should not be trying to do this anyway really…