You should read HoME LAST if you read them at all (which, from what little I can tell, you probably will, except perhaps for stuff like The Lays of Beleriand, which you'll skip for the same reason I did.) If it's been so long it's hazy, I recommend reading them in chronological order of publication: The Hobbit, the Trilogy, the Silmarillion, the Unfinished Tales (generally regarded as canon even though published in much the same way as HoME) and finally, HoME. The Silmarillion is a truly stellar book, but you need the Trilogy background, I think. And if you read HoME before the Silmarillion you'll NEVER keep all the changes straight (I still have trouble remembering which parts are the official Silmarillion version of some stories and which are the non-canonical parts of HoME.) Plus, opinions are VERY split on what is and isn't canonical in HoME; my personal opinion is anything not EXPLICITLY CONTRADICTED by the Silmarillion is fine, but others hold if it's not in the Silmarillion, Trilogy (Hobbit included) or Unfinished Tales, it's just a potential revision the Professor never made. Now, why UT makes the cut and HoME doesn't I have no idea, but that's another perfect example of what I mean. Reread the Trilogy, or maybe the Silmarillion first and then the Trilogy (that should be fine, and the Silmarillion is a great book.) Until you've read the Silmarillion you have no way of knowing if HoME's worth your time or not, at least the first few before you get to the notes and manuscripts of the Trilogy in the middle volumes, and things like The Shibboleth of Feanor are irrelevant to you right now.
Oh, and howdy, welcome and enjoy your stay. The more the merrier. See ya 'round the boards.