My First full-length sweater

The yarn I'm using is 100% alpaca Puno by Filatura Lanaroto that I picked up at the Smiley's yarn riot in Manhattan last month. I think I will need some hand holding when I get to the hemming. I've read that part over several times and I still don't quite understand what I'm supposed to do. Other than that, it's going well and I can't wait to wear it! I'm off to start the second sleeve right now.