Well, let's say you want to get into CPA. First, find out what that means. Look on Google. After that, try searching in here what that means, other members asked about it, and other replied nicely.
Secondly and essentially, find out how that works. Not how you will start making some money, like methods and such, but find out its principle. Also, here is a thread of mine regarding what CPA networks would expect from you, if you don't want to have any troubles with them, regarding your account status, or in other words, to get your money and don't end up banned on the payment day.
After that, start reading a lot in the CPA subforum. And don't go just for the latest threads, but go deeper. Find out its basics methods, advanced and so on. See what other people asked, replied and such. When you don't understand a term, like 'leads' for example, simply Google it.
Make your head cloudy with as much info as you can, and after that you can start asking specific questions. We all know that quality questions or just questions straight to the point, gets quality answers. If you are planning to find out how to make it in the CPA or PPC industry by asking "show me the way", people will tell you as shortly as you asked: google it, search in forums, read. See? THe people above me did that, I did that, so don't wonder if you didn't got what you wanted
I'm sure you will be on your good way, if you will take this seriously and seek for what you look. You will find it, whatever that is.