Howdy, Ardhoniel, welcome; enjoy your stay. We're Mostly Harmless, as you've seen, and there's always room for one more (especially if they vote at the link. ;-p) You're in for a real treat with the Silmarillion; many of us like it better than the Trilogy. So much more epic; for the umpteenth time I say Feanors solution to Sauron would have been to personally and single handedly kick his rear up one side of Middle-earth and down the other. He'd have done it, too, unless Fingolfin beat him to it.
Sadly, it was Tolkiens great life work, which means while the story is finished (thanks to the doughty efforts of Guy Gavriel Kay and Christopher Tolkien) we don't have it in the kind of detail we've all come to know and love in the Trilogy. The closest thing to that is the tomey History of Middle-earth, but I think I can establish an overwhelming consensus those are best saved until you're QUITE familiar with the Silmarillion and Trilogy. I still occassionally have to catch myself: "no, that was in The Book of Lost Tales Part II; it was changed to x in the Silmarillion, and the Silmarillion, not HoME, is canon. " Though I personally feel anything in HoME not expressly contradicted by the Silmarillion (or elsewhere in HoME) can be accepted as canon; who's to say otherwise?
All of that by way of saying, "Hi, enjoy, and see ya 'round the board." ;-p