Don't bother. STM can occassionally be good for making connections (ie. ad network reps, exclusive offers, etc.) but only for people who know what they are doing and have something to offer besides newbie questions. Most of the forum is just failing CPA networks and low-tier RTB mobile ad networks hustling for clients. And a bunch of Charles Ngo fanboys living in fantasy as well. Like all forums in the industry it is not a good place if you don't have the experience to tell bs from real talk.
A far better idea is to sign up with one of the spy tools for a month and look at how people do paid advertising to offers in practice. Then select a self-serve traffic source (visit publisher sites you find from the spy tools and use wheregoes.com to find ad networks that run on them) and test, test, test based on your findings from the spy tool. While testing figure out tracking and how to tweak ads / landing pages by yourself. That's the only way to learn and it takes a lot of work, sleaze, risk, boredom, frustration to make it happen.
Affilaite marketing is a regulated industry with established players these days, so absolutely nobody (not even a CPA network) will teach you how things are actually done right now. Because that creates competition / saturation and steps on others' toes. You have to force your way into this stuff in 2015, and it takes a real work ethic and risk-tolerance. So just get to work and after you've made a small amount of profit, maybe sign up to STM to see if you can find any tips to increase that profit.