Hey you! The Keyboard player!

Congratulations and welcome to the wonderful world of keyboards!  Exactly what the world needs, more keyboardists and fewer guitarists.  

You said that you just started keyboards, but you didn't say whether you just started with music as a whole...so I don't know how familiar you are with music theory, if at all.  As Rick Wakeman once said, "you are only as good as your vocabulary" so what you should do is learn the basics of theory as a start.  You could always play "by ear", but wouldn't it be better to know what you are doing?

A quick and dirty way to get up to speed would be to do one (or a combination) of the following:
1.  Find a piano teacher and take lessons.
2.  Pick up one of those Piano For Dummies, Music Theory For Dummies or similar book and devour it.
3.  Get a beginner keyboard that has a few basic functions, but includes a teaching or lesson function.  Several of the inexpensive (less than $400.00) keyboards by Yamaha and Casio have features such as teaching mode, light up "follow the key" modes, etc., which can help you learn.

Once you have an instrument and a guide (be it a teacher, book, or automated), it is time to practice!  Can you spend 30-60 minutes a day with your instrument?  Practice...practice...practice!
Get to where you understand your scales, modes, and chords (and inversions)

Once you are familiar with music theory and can read music, I would suggest finding a copy of a book which (iirc) is called Hannon Exercises For The Virtuoso Pianist or similar title.  These are a series of scale/fingering exercises to develop dexterity in both hands.

Lastly, while a Voyager is way cool, are you sure this is what you want?  I have only played one once, but I believe that the Voyager is monophonic like the original MiniMoog.  This means that only one note sounds at a time, hence no chords.  Plus, a Voyager runs around $2600  to $3000.  For that kind of money you could get a very nice Korg, Roland, Kurzweil, or Nord synth which are polyphonic and expandable.  If you are set in the idea of getting an analog sounding lead synth like the Moog, check out the Korg MS-2000B.  At $750, it is a lot cheaper than the Moog.  It is not as fat sounding, but very close.  Plus it has 4-note capability, delay (does the Voyager have a delay?), and a way cool vocoder!

Have fun and remember: PRACTICE!

Guys-

Thanks a ton for the info. I guess I forgot to mention I've already played
electric bass guitar for five years so I'm pretty fluent in music theory. Not
exactly like a pianist would be, with the classical elements, but my ear is
pretty good by now and I can pick out songs easily. At least, more easily
than I could when I started playing bass.

I'm really trying to avoid learning how to read music, though. That may be
a drawback. I never learned how to read for bass guitar, but I'm pretty
good at that, so I'm confident it can be done on keyboards as well.

The main reason I want a Voyager is development of sound electrically. I
have been reading up on the CV outputs and LFO destinations and all the
beauty of analog sound creation. I guess the real reason why I wanted to
get into keyboards was because it's the only instrument where the player
decides exactly what it sounds like.

I did just take a look at the Korg MS2000B. It does look pretty dope. I just
know one day that I will want to have a Voyager. Two years ago, when I
had no intention of ever playing keyboards, I saw the Voyager and said,
"Damn. I wish I played keyboards!"

Here I am.

My Rhodes is bad ass but I believe synths represent the pinnacle of
human achievement.

PS An inversion is just when you switch around the triad notes right? Like
1-3-5 goes to 3-5-1 and then 5-1-3? Correct?