Good job! Don't worry about cutting her, it happens to everyone.
Just for future reference it looks like your tension on the blades wasn't quite right. There's still quite a bit of fleece on her which happens to me when the tension is too loose and pulls the wool more than cutting it cleanly. It's really hard to figure out and takes practice but now I can hear when it needs to be tightened. You may have also just been nervous and not gotten as close as you could have. Don't be afraid to go right along the skin like you were shaving a poodle face and get a nice clean cut. All in all your first sheep looks way better than mine though!