I bought the Design Studio specifically to make cute 'shaped' cards, and have never used it. Mainly because, irritatingly, it can only be registered to one computer, and mine is in the USA. I will play with it when I get back. In the meantime, I worked out a way of making cards that do not have to be attached with a brad or ribbon, which never works very well for me. It would work well with all simple shapes, and really does not take long to do. I'm off to do a shoe next!
Cut out your chosen shape on your Cricut. I recommend using cardstock rather than paper as it serves as your template, and also makes the front of your finished card.
Draw around the shape carefully
Flip the shape over - do NOT overlap the sides, just place the flipped piece exactly on the line of the first shape as shown. Draw round the shape as before
Cut out your outlines leaving the join uncut Attach your original pattern cut to the front of your card