Making your cardigan seriously couldn't be easier. By utilizing sleeve theft of a perfectly long sleeved garment, all that's left is to turn it into a draping embroidered masterpiece. If you can cut and sew things in a straight line, you're set. If you can't, you should really put that glass of wine down and come back to this later.
So, to make your long sleeve cardigan, you'll need:
Two shirts, at least one with long sleeves. The one with sleeves should be a size that fits your arms comfortably. The two can be matching, but it doesn't really matter. The whole color blocking thing is in this year, so you could probably get away with it.
Light no-show mesh cutaway stabilizer, best for garments*
Scissors and pins
A flippin' awesome embroidery design, like these wings, for the back. Keep it light unless you're making this out of a heavy sweater or something similar*
*items marked with a star are for machine embroidery users only