Hey, welcome to the site!
The 4 piece setup is a very common thing, so i wouldn't worry about the other tom for now. im sure pretty i posted in your other topic about that tom mount so check it out when you can.
I felt the same way about drums when i first started. Every time i listen to music now i pretty much tune everything out except for the drums, if i hear something buzzing or humming ill make a pattern out of it.
Always tapping my finger in class.
Great to see a new drummer!
By the way, i would get either the evans ec2's or the remo pinstripe heads if you get new heads, they're both awesome heads.