Im a total noob to theory, Ive been playing for 6 months and I just dont understand this stuff, Ive read a bunch of stuff on it and my gf has tried to teach me some stuff, but I just cant get it. The only thing I think I get is that Major has sharps and Minor has flats, is that right? And I also dont understand what makes it a 7th or 3rd on any other number. Im sorry Im too dumb to get this, but can someone please explain it to me in very simple terms? Or at least point me somewhere that explains it well?