Very pretty sweater. Thanks for the link. The best way to learn is probably to jump in and start this. Trying to figure things out ahead of time is a good idea; however, it sometimes only makes sense when you get to that point in the pattern.
With that said, I recommend using a lifeline every so often so that if you do make a mistake, you don't have to rip everything out and start over again. Instead, you can just rip back to your lifeline. There are lots of good videos on YouTube about lifelines (if you need more info). Here's one: http://www.youtube.com/watch?v=XS8qzSaJnZA
Good luck with your sweater. You know you can come back here and ask for help any time you need it!