It takes a lot of playing around (trial and error) with your program until you get decent at it. I've probably been playing with CS6 for 6 or more years now.
I think this was my first-ever sig:

Dat MS Word font
This is probably the one I like the best that I've done more recently.

or maybe this one

So all I can really say is keep experimenting and seeing what different things do. There's going to be a lot of trial and error before you get even one thing right. Generally be mindful of shadows and where light comes from; don't have light on a shadow, or visa-versa. and check out dafont for some better fonts
This post was edited by Terps on Aug 22 2017 10:00pm