@Pinopi: Judging by those tags you're at the very start of tag making, I'd guess you've been tagging for 1 week or so. Noob is such a bad word so let's say early beginner. Your main areas that needs more practice is blending, colors, details and text.
Keep at it, drain yourself in tuts and you'll conquer the ladder in no time
Do you have any tutorials in mind? any tutorials that helped you in signature making.