I have used crotches a lot...bowls, platters, hollow forms, natural edges etc.
I would agree with the advice to ensure that the pith is not in your bowl.
I've posted a couple of YouTube clips I did a few years back.
I think they might help you visualize what you want to create.
The first video is a white board discussion of planning to process a crotch
The second is the first part of a three part series in creating a heart shaped bowl from a crotch