Yeah they aren't bad for starting with that lens, but you'll want to use a tripod for these kind of intense macros. You'll want to decrease your aperture to at least 5.6 or until your DOF covers the majority of the frame. If you're too lazy to use a tripod (like me) try using the shade and resting it against the glass. This will allow for a slower speed. You're also a little under exposed which resulted from shooting in shutter speed priority which maxed out your aperture, try aperture priority instead.
If you're still having trouble with DOF you can try a focus stacking technique which involves stacking multiple pictures at different focus points together. I gave it a try a little while ago and had good results, these were made from 7 separate images:
You just have to be a little careful because the stacking does seem to create some over exposed areas. These could be fixed with a little layer blending in photoshop.