Definitely go to the superior threads site. Look under the education tab. That said, what kind of thread you use depends on the effect you want on your quilt. Embroidery thread is usually shiny and is great for hightlighting areas on a quilt -- eyes, sun, flowers. The heavy weight threads will show and are great if this is what you want. If this is your first attempt, you might want to use a 50 or 60 weight. These ligher weights will blend into the background and all your learning "mistakes" don't show up so much. As stated above, use a quilt sandwich with your actual quilt fabric and batting, and have fun trying out different threads until you find the one that gives you the effect you want.