Ariel is a good font choice. You can try Serif too. The only time it's good to use other types of font is if it fits in it.
The new signature that you made looks sharp, and your text is roundish, which doesn't fit very well.
That background is decent. You should have tried and spent some time blending the render into the background as well. Also a larger canvas would have been better. The text is horrible and needs work. Try using normal original text like Ariel, etc.