Boxy and oversized, however, translate into easy to make. 
Non-boxy means more complicated shaping and finishing. For a fitted sweater, you need to measure carefully, have very consistent gauge, and there is little tolerance for mistakes. Do you have a friend or relative who’d like a big ol’ smooshy sweater? And, heck, doesn’t everybody need a roomy, comfy rainy-day sweater, anyway? You don’t have to wear it in public. 
I don’t want to discourage you, though. Maybe you have more of a knack for these things than I do, and you could jump in to a more complex project—especially, of course, if you have some experience with sewing and design. And if you’re the sort of person who doesn’t get frustrated easily, and can face difficulties with calmness and firm resolve, I don’t think you should be afraid of trying something “Tangy” from knitty for your first sweater. Plus, also, I love knitty, but it’s not the end-all be-all. (Blasphemy!) Do you have a knitting shop near you? You can totally wander into one of those places and explain that you’re new to knitting, and ask what books and patterns they have that might be appropriate for you. A small knitting shop is definitely the best, but if you don’t have one near you, you can also see if someone’s doing a class at yer friendly local big-box craft store.
But, hey, there’s plenty to do before you tackle a sweater. Dish cloths! Scarves! Hats! Baby clothes! Mittens! Socks! Wee stuffed sheep!