im using paint.net and im looking for a plugin to bring my signatures to the next level

my current signatures are looking like this



what im looking for is a plug in to make the outside of the signature look more like these






any help would be amazing im currently going through google and youtube to try and figure this out but so far no luck

Cheers

my first attempt still have a long road to go but i think i figured it out with just a smudge tool

Def. not a bad looking one (top one mainly) for a paint job. So good luck continuing on your learning!