Lydia on BurdaStyle can be altered into a hoodie (don't use the hood pattern that is posted on there, it was horrible, sorry to the person who drafted it). Just trace a hood onto paper and make sure the length of the neck part matches up to the length of the neck on the shirt pattern (measuring tapes are your friend
). I think Lydia is 3 bucks and it worked out great for me. Just make it one or two sizes smaller than what it says if you're using a t-shirt fabric and want it to fit close to your body. If you're using sweatshirt fabric and want it somewhat loose, use the size it tells you to, based on your measurements.
Also, once you have something that works really good, trace it onto bristle-board, that thin cardboard for making... the backdrop for a science fair project. You know? The cardboard will survive many many additional tracings better than paper.