I agree with the folks that suggest getting an inexpensive outfit now (I?d suggest a 5 or 6 weight) and have at it. Start terrorizing some local LA bluegill and small bass in freshwater. It?ll get you casting, and you?ll learn about the gear like leaders and tippets, knots, and fishing different types of flies. A 9 foot 5 or 6 weight would be great in Colorado, but would also be a good freshwater rod for small bass and big panfish. I think I would also lean towards a 6 weight since it will throw bass poppers a tad easier than a 5, but either one would be good. A 6 weight would be a little light for saltwater to chase reds and specs where a 7, 8 or 9 weight would be better suited for dealing with wind and larger sized flies, but you might get a way with it on calm days and/or sheltered bays. Since you plan on travelling, I would get a four piece rod since it can be carried on as overhead luggage on planes instead of having to be stowed as checked baggage.

Ron Eagle Elk gave you a great link on FAOL with info on getting started. There are also excellent books available for free in your library or through their inter-loan program. Or you could buy one for about 16 bucks like:

The LL Bean Ultimate Fly Fishing Handbook http://www.amazon.com/L-L-Bean-Ultim.../dp/159228891X

or the Orvis Guide to Fly Fishing http://www.amazon.com/Fly-Fishing-Co...ref=pd_sim_b_2

Either one would make a good resource for you in getting started.

But as others have suggested an even better way to get off to a good start is to join up with a Trout Unlimited Chapter, or fly fishing club affiliated with the Federation of Fly Fishers. Most are very welcoming to new members and devote a lot of effort into helping new comers to the sport get started, with casting clinics, beginning tying classes informative meetings and group trips to local waters. Here?s a link to the search page of the Federation of Fly Fishers. You won?t find TU chapters in LA, but if you do a search on Louisiana you?ll see several FFF affiliated clubs throughout the state. Depending on where you are Louisiana you might want to search neighboring states as well to find one close to you.
http://www.fedflyfishers.org/Default.aspx?tabid=4357

Getting some basic skills under your belt before your trip to CO will make it more enjoyable and you?ll spend more time fishing and absorbing ?intermediate level? information about trout fishing in moving water as opposed to trying to figure out the basics.

Good luck,

mark