If you knit the sweater in pieces (front, back, sleeves) then you have to seam them together and that can sound confusing in the instructions until you see all the pieces. To avoid this one can knit sweaters in the round either bottom up--like many Elizabeth Zimmerman patterns and in the book Knitting Workshop. Or top down as promoted by Barbara Walker. There are some top down pattern books and most of the Knitting Pure and Simple patterns are that way. I prefer the round method but it's good to do at least one with seams. Seams come up in other patterns and some people like to seam pieces together.
If you're taking a class and can already cast on, knit, purl, increase, decrease, and bind off you will be able to make this sweater.