Hi Fayerody!
I've had precisely the same feeling when considering posting on a topic (in particular, an illness) about which I know very little or nothing at all. I took a while to post to Alex K simply because I knew so little about her condition and didn't quite grasp it. Finally, I simply asked her about it, and this broke the ice. She's since become one of my favorite people on the site, but I confess I do feel a bit vulnerable when I don't know the person (but would like to) and find her academic papers on her condition over my head on occasion. I guess the best advice I can offer is to just ask. Might even learn something! (I did !) Ta. Cheshire Cat