The reason you are having the text problem is because your signatures don't have focal points within them (the spot where the viewer is supposed to focus). Always remember to have a clear focal point in mind when you begin the signature. You can make sections more noticeable in a few ways (blurring the background, sharpening, smudging, lighting, etc)

My favourite trick is to create a new layer > go to Image and hit Apply Image> Filter Guassian blur at 1.5 > and just erase the parts of the layer that you want to be more focused. Youcan lower the opacity too so the blurring isn't that obvious.

Keep at it man, I look forward to seeing more from you!