First, I applaud your desire to contribute.
When I first came here I was essentially useless as far as all this fancy digital audio stuff... but I was hell bent on learning because I lost my old music release of playing in a buttload of live bands. I got tons of help here and made many friends so I, like you, thought it only right to help where I could (kind of been slacking on that lately because I've been ballz deep in actually putting the things I've learned into action... but that's likely making me more useful/experienced so I can give better advice in the future).
Whatevs...
Here's what I try to do and it's pretty simple. When I'm feeling helpful and have the time to type up one of my long winded responses (such as this one... lol) I just check in on the SONAR SubForum, look at the thread titles and try to find topics/questions I am comfortable enough with to provide an answer. If/when I find one I click through to see what's up and if the OP seems genuine* and I can at least point them in the right direction I do so.
By doing this regular scanning of the forum I of course also find topics/discussions about things I need to learn and/or have never even heard of so it keeps my dumbass moving forward too.
There's an old Simpson's where Marge decides she's going to teach piano to help save the family finances. When it's pointed out that Marge doesn't play the piano she replies "I just need to stay one lesson ahead of the student".
I think that is a good philosophy to take if you want to become a more active member of the forum.
eg: As you learn and gain experience (as you have done) look for folks struggling with something you've gone through and figured out already and try to help. At the same time keep experimenting and asking questions of your own as well as exploring threads on topics that are new or not so clear to you.
So you keep moving forward and the pool of users you can help (via your own experience and studies) grows.
Anyway... that's my advice but I'm a weirdo.
*re: genuine... There's been a lot of increasing silliness in the SONAR sub. Some folks just want to freak out and get attention. Trying to help some of these folks can end up being frustrating to the point that you simply lose heart. Don't fall into that trap.
Cheers and good on ya.