I tell myself over and over, "done is better than perfect"! Also, I take a kitchen timer and set it for 10 minutes with the promise that all I have to do is work on the quilt until the timer goes off; invariably I am very surprised by how much I got done in that 10 minutes and want to continue on. If I'm still anxious, I just reset the timer for another 10 minutes. It's a way of getting over the "hump" of getting started.
Regarding which project to start with, I would recommend Yellow Brick Road just because there really is no right-or-wrong to that pattern, even if you cut some of the blocks incorrectly. Like Tim Gunn, you can just "make it work" no matter what mistakes you have made along the way with cutting or sewing. Easy peasy.
