Could you use help answering questions? I was a pro photographer for over 40 years shooting the Oscars, The Emmy's, weddings etc etc.... I was taught that if you truly are a photographer you should be able to shoot anything. I am trying to give back some of what i was blessed with so I though I would ask Thank You in advance Pops
Pops, welcome aboard, and of course we could use your help. Stackexchange is about crowd-sourcing information, so the more the merrier.
I'm only a hobbyist photographer and professionally a technical writer, and I've been able to contribute.
Because this isn't a messageboard, there's nothing to stop you from looking over the older questions in what you feel to be your areas of expertise, to see if there's an answer you can add that fills in the gaps. That's how I started out, and I ended up gaining reputation pretty rapidly. The more reputation you have, the more things you can do on the site.
Just take a little time to get acquainted with how Stackexchange works. The Help→Tour is an excellent place to start.
Anyone can participate, so of course you can.
However, I strongly recommend you properly fill in your user profile, including your name. Nobody is going to put much stock in what USERxxxx says. We get a lot of drive-by one-question users like that, so any user with a name like that is much more likely to be dismissed and assumed to be a help vampire than someone willing to stand up and put his reputation behind what he's saying.
Put another way, to be really affective it's not good enough to just be right. You have to give us some reason to trust that what you say is in fact right.