When I first bought my embroidery machine 9 months ago I was overwhelmed by the colors and types of threads. I first looked at the designs that came with a machine and the required colors. Figured I would go by the book so to speak before being creative and changing colors. I ended up purchasing 5 small spols of Sulky embroidery thread using coupons from Joanne's. Each time I went to the store I would pick up one or two different color spools depending on the design I wanted to stitch out.
My machine is finicky and only likes Sulky. I have tried other brands but it's not worth the frustration.
by now I have a slimline case and a half of various shades of different color threads that meet my needs. If you try different thread brands my recommendation is to buy only one spool as your machine may not like it. You can always you the thread for regular sewing. Good luck