These are all interesting shots. They're bright and colorful, so you're off to a good start!
Photo 1 - Good idea, but needs some tweaking. Putting your subject so close to the bottom makes it feel like she's about to slide out of the photo!
Photo 2 - A better-framed shot than the first. Why did you choose that soft focus? Was it post-processing?
Photo 3 - Those funky headpieces are fun to shoot, aren't they? ^_^ Watch your background. There's quite a but of clutter. Your narrow depth of field helps, but I would suggest moving your subjects to a less crowded area. Even a simple blank wall could do!
Photo 4 - Cute shot. Again, keep an eye on the backgrounds!
Photo 5 - I like that you're trying an off-center portrait. Not quite as engaging as your others, though.
Thanks for sharing the photos! Good luck!