Hi,
I took a full day's class with Jinny at her last seminar on her hand piecing technique. I have her hand piecing book, and her CD as well. I find that the book has excellent instructions. She is amazing. I love her technique, but I modify it slightly, by pushing the needle with my fourth finger instead of my third. It gets better with practice. I'm actually finding that hand piecing for me is more relaxing and much more accurate than machine piecing, although I still do both.
Keep trying, and do what is best for your hands.
Happy quilting,
Kathy R