Sounds like your art is a raster - in order to get the score/cut options you’re going to need to have a vector line. If you’re a Premium member then the shapes they provide are vectors.
and yeah, I’ll echo what @caribis2 said - start with the PG leather settings, being sure to use Set Focus, and tweak from there. There is a lovely test cut that you can use once you have an idea of where to start.