Realistically... there is no quick head start. The learning curve is steep, and even if you think you've planned the whole thingy out on a patch day you will still spend 2 days or more ingame writing/testing macros lol. Trust me, argh... /facepalm.

Read the stickies, download the suggested addons, etc etc. Try out a few class combos to 10 even, before you invest all of your resources into them.

Most of all, have fun. Don't treat it like a race (you're not wasting time - you're investing time now so that later on you won't have to waste time waiting on others like 99% of the regular WoW poulation on any given night hehe)

Best of luck.