I'm new to bass.. and I have so many questions..

So how do I do a "drop d".

Do I tune the E string (lowest string) to make it sound like a D?
Drop D is two flats below E, so the 7th gret on your E string should sound like your A string.

Or if you have a tuner, press the flat button twice and tune to E.
you tune the E string down till it sounds like D
but i spit on that, in my opinion bass is way to awesome for drop tunings, but its you bass, your style, do what you will.
any other questions?
Quote by The Pickle Man
If that's the best Chicago has to offer then... well... too bad for Chicago, I guess.
IMO bass sounds great in drop D.

I'd love a Hipshot Bass Xtender on my bass to get to D in a snap.

Quote by WashBurn!
What's a flat button?

If you've got a tuner it'd probably say "flat" on the button.