I assume you wer experimenting with a brush sig. I will probably sounds harhs, but that is the best way to learn things quickly. When making signatures, there are three things which are key to every sigbaturem
You should start reading baisc signature tutorials since you messed up on all three of them. I would like to give CnC but when all 3 went bad, it more or less means that you can better give up on it and try it again in another work. In case you dont know hat those 3 terms mean I will give a quick explaination.
Blending: how well your render goes with the background
Flow: the direction of the BG, for example rain always move below, so the flow goes down.
Focus: makes one thing in particular pop out of the rest (most of the times it will be the render)