I was supposed to do 50 scarves??? I did one. Well, part of one. I knit until the partial skein was gone. Then I made a baby afghan and a baby sweater. That's typical, I've never been big on following the rules.
You can do a sweater, you can, you can! And don't be scared of cables, they're easy. I taught myself in one evening, just me and some knitting books with good pics from the library.
Let us know when you take the plunge!