3 years ago my DIL gave me some tee shirts and asked me to make a quilt for our oldest grandson who was graduating from High School. I learned alot in making that.
First of all, to give the most stability, use a non woven, iron on stabilizer. The other thing I learned is quilting is almost impossible. Almost every thing I read was to tie it not to quilt it.
The best part was when he opened it. "So that is where my tee shirts are!"
This year no. 2 is graduating and I am waiting for the shirts. Good luck on your project.
Mary