Newbie to Newbie!
I agree with the "use what you're the most comfortable with" but yes also, easier program can have limitation that doesn't fit your need. I suggest you check out what's available and decide what to buy, or opt for something free like n-track if you're on a tight budget.
At the company I'm working they have a bunch of them so I had the chance to check some of them and I decided wich one to buy.
I tryed Sony Vegas DVD, I liked it for a while but the buses system for surround didn't worked well for what I needed, so I dropped it.
I used Cool Edit for a while because it was cheap but I really turned when I tryed a demo of Cakewalk Sonar, then I found exactly what I was looking for. Sonar is way more complicated to me, but when I bought it, the manual ended up being my best friend. And reading over here (and Cakewalk forum) I figured out a lot, but I still have a lot of things to learn on it, but it's mainly a matter of experience now.
Here's a learning trick, when you get into a new software, look to acheive exactly what you can do in an other software, then after you'll have to discover what you cannot do yet, don't let yourself be impressed by all the features that you might not need afterall. Most software works on the same basics. I learned what I know because I knew 3D animations softwares (they both have, tracks, layers, events, fade in, fade out, ease in ease out, punch in/out etc...).