I cut a 12x12" square and went straight to work on my second bowl. I still have a lot to learn but I really like the art of forming sheetmetal. I plan to make a few more bowls, adding a new challenge/feature to each bowl I make. My next bowl will be deeper and have a horizontal flange on the outside of the rim of the bowl. After that I want to figure out how to make/leave a flat spot in the middle bottom of the bowl so it can sit stable. I've got a few more ideas beyond basic bowls before I move on to a new rear fender for my motorcycle.
I took pictures at each step of making bowl #2.
Above you can see I used the shrinker again.