Tamara,
Your quilts are gorgeous!
To center the block ITH, I found it easiest to start with marking cross points on the block. Then lay the top hoop center marks on the center points. Hold the quilt sandwich and the hoop together, then load into the bottom hoop. It will usually be centered fairly well.
May sound easy. Reality is... it usually takes some adjusting. LOL. Even the magnetic hoop slipped a couple of times and I had to re-hoop the quilt.
Linda, Please don't be intimidated with all the terms and techniques. You can do it if you want!
A few designs here that I have used for quilting.
https://www.anitagoodesign.com/produ...gory/quilting/
Good luck!