You'll have it soon. You're already in the forum and you just have to start giving time for the topics that you want to read and learn from there. It's about the knowledge that you can acquire from those informative posts that you don't know. Or even to the topics that you already know.
If you're more knowledgeable than the others, you can contribute on your own because it's always that the newbies really are the newbies. Everyone has their own knowledge gained elsewhere that can be helpful to the others as well despite being experienced and knowledgeable too.