You are not alone. I let my HQ Sweet 16 sit for quite awhile before I worked up the courage to start, and I've heard quite a few other people say the same. Why not take it in small steps. Go and thread your machine for starters, wind a bobbin, check your bobbin tension. Get familiar with your machine so it doesn't feel like a stranger. I would suggest not starting on a real quilt; do some practice sandwiches first. You will be thrilled once you get going.