I wanted to do one on a tee shirt for Irene, but first I practiced on a dish towel.
Patterns are available on line. I like Embroidery Library. There I find designs, buy them with a credit card, and download them to my computer, using software that I bought with my machine.
Designs come with instructions , steps in the process, and thread color changes to follow or adapt. I print out the instructions.
The card is inserted into the machine, and tells it what to do.
The first step is to run a paper template of the fabric pieces needed. These are stitched on paper with the sewing machine.
I punch these out and use them as patterns to cut the fabrics, which are backed with iron on stabilizer.
The machine provides an outline to place each piece, one at a time, sews it down and then repeats for the next, until the process is complete. I change the thread color as needed, and carefully place the fabric pieces in the outlines.
It is very cool. Now I want to do more.