Lady C - Nice looking roadster. All of the above info is right on the money, and there is a ton of additional detailing info on this forum using the "search" function.
My input for an apt dwelling XFire would be:

Wax - I know it's blasphemy, but I would clay bar and use NuFinish given your situation. There are lots of boutique waxes out there, but NuFinish wears like nails, whereas the other don't seem to hang in there as long. It's readily available for about $6 and I use it on my daily driver for the Mich winters with great results. Just don't get it on the black trim. A detail spray would help maintain the finish also.
If your apt complex has an outside hose spigot, get a 50' foot hose and bucket to rinse your car down once a week or so to offset the ocean salt concerns.

Trim - Use some type of rubber protectant on the black trim pieces like 303 or Meguiar's. This can also treat the tires. Meguiar's makes handy wipes for rubber protection and for leather care.

Top - Protect it with 303 Fabric Protector or Ragg Topp. If your car is parked outside in the sun for any significant time (like when you're at work) consider buying a California Pop Top Car Covers, Car Sun Shades - California PopTop Besides keeping your top looking like new, it'll protect the dash, leather seats etc... from the sun. I've got one for each of my convertibles and they work!

Probably the best piece of advice is to get to know Mike-In-Orange and have him detail your car