Jeff, One of the best first projects is silnylon stuff sacks. Extremely easy to sew and it is an item you can use right away. After that probably the next easiest is a 5x8 silnylon tarp or try making the thru-hiker minima vest.
Though techinically not that hard there are a few challenging steps to a down quilt. If you don't sew yet I would recommend you make a light synthetic quilt first. Much easier to do and much cheaper.
One word of warning the thru-hiker down quilt kit is nothing more than 2 pieces of material, some noseeum netting, and 2 bags of down (6 oz each). There are no other instructions then what you find online. You will need thread, drawcord, cord locks, and other items depending on how you choose to finish the quilt.