This is one of the very first garments I ever designed (2-3 years ago). And I tell you, when you are learning, there is no replacement for doing. Even when you don't know what you are doing, you learn so much just in the trying and learning from experience. Like I learned when you are doing a drop shoulder, that the sleeves need to be shorter to compensate for the extra fabric at the shoulder. I also learned that in a cardigan, the neck doesn't have to be as big because there is plenty of room because of the split fronts. As you can see, I had to add a few extra rows around the neck and front edge to help close-up the neck a bit. I also learned, that if you make something purple and add a little fuzz/sparkle to it, even a very picky 5 year old (at the time) will wear it with pride, even if it's not perfect.