Emily, I think the exposure, colours and model:-) are good, but like they said above, the focus is a little off. The other thing is you may like to get brid of the white spots which are also a little distracting. The pose is really good and I would try this one again if I were you.
Nice to see you Emily ? looks like you are your own best model?
In looking through your self portraits, it seems most are out of focus. I am not familiar with your camera, but I think there?s a good chance that it?s focusing on the empty scene when you press the shutter to start the self ?timer (in this case focusing on the wall behind you). You might try to place something in the spot where you?ll be for the camera to focus on, then in the 10 seconds or so before the shutter trips toss it aside and stand/sit in that spot. I?ve had luck fooling cameras in this manner?