I only stitch by hand , so not much help . I just wanted to welcome you to the forum, someone with machine knowledge will chime in soon.
My gut feeling is it would not work for what you are wanting to do,more of a home clothing type machine.
You did a great job on the diamond design. It looks clean, and well plotted.
In my mind if you asked me to use blue thread with brown, I would say it would not work, but it did!
Go to Springfield Leather. Kevin the owner is a major rock hound. I know they (or Kevin himself) would be able to get you going in the right direction. I hope this helps.