The background needs some detail. On both sides there's a plain color, which is boring. If you don't know what to add there, smudge something or add a texture.

The effects on right side are quite well, but a bit overdone. Wireframe ones look good, so do that frame-like effect that goes to the very side of sig. They also create some flow. The curvy C4D that's over the two I mentioned doesn't add anything, just clutters the area.

The bit going over her arm is positioned well, though. So is the text.

Overall it is quite nice for a beginner. Just avoid plain areas most of the time and make sure that effects you add complements the sig as whole.

Hope I helped a bit.