I am fairly structured, too, but am slowly breaking out of the mold. To help you out, I can suggest two kinds of scrappies to start with because you really can't go wrong.
One is a 16 patch and the second is a string quilt. Youtube has all kinds of videos. Just make sure you have some light fabrics to provide contrast, or your quilt will look busy or dull .
For a string quilt, you don't have to abandon your structured nature (no sense fighting it, just think "expanding your horizons") . Just pick a focus fabric you like and pull colors from that. Of course most string quilts have a common color (often white) that goes down the middle of the block as the first piece. When they're all put together, that white provides a design element .
But you probably know this already. Consider yourself among friends who share your tendency to be structured and yet want to be a bit more loosey-goosey
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