I have the 7700 -- and a great way to get acquainted with your machine is doing a stitch sampler (some folks call it a stitch bible). Take a pieces of plain fabric with stabilizer behind (cut a bunch of a standard size that you can handle) it and contrasting thread (I use unbleached muslin and red thread) and stitch out the different stitches using different widths and lengths for the fancy ones, label the stitches so you know what the settings are. This will give you a reference for how the stitches look and what adjustments work and which ones don't. I repeat this process with stitches that I think will look nice when I quilt, but I make a quilt sandwich and again make notes. This way I can easily see what works for quilting (or sewing on binding) and what doesn't.
I have made one of these for all of my machines going back over 30 years -- it's a real help.