Since embroidery stitches are so much denser than regular stitching, it is important to use a lower weight thread in the bobbin. Most bobbin thread tends to be 50 or 60 weight while the top embroidery threads are usually 40. It will make a difference in how your design turns out.
As to your purchase being from Ken's Sewing Center, you have, IMHO, gotten the best dealer in the country. They are so supportive and will help you with any questions. If they don't know the answer and tell you they will find out and get back with you, they actually DO IT!
Hope you and your machine have a lot of fun together!