I play all of the Preludes myself, my favorite ones would have to be:
Bk1: 3,5,6,8,10,11,12
Bk2: 5,6,10,12
"Fireworks" and i am so confused. it looks like patterns, but the fingerings are so confusing. there is also a glissando with just black keys. do you know how to do that? did anybody ever play that one before?
You are probably confused because it is one of the harder preludes. I would personally suggest you go and do Bk1no6 Des pas sur la neige before the Hairy girl

I played the Bk2/12 for a concert a few months ago. It definatly is one of the harder ones if you haven't cracked your control of arpeggios since it is mostly constructed out of those! The black key gliss in Bk2/12 can be targeted two ways.
Some people open the entire hand and slide down the keyboard with all the fingers palm facing down. This works, although i find that it is a little unclear, messy.
I personally use 1 and 2 pinched together, fingers perpendicular to the notes. This is because later on there is a two note, black and white gliss in one hand which requires the same fingers, the thumb playing the white and the 2nd playing the black, so this creates sorta a standard early on.