its ok but u leave it to simple, all u did wa add the render and put c4ds.... u gotta blend it in, add some depth, filter it a little bit and just mess with it, 2/5
Looks like my sigs when I started (all brushes).
Mybe just focus more on one part of your sig instead of putting brushes all over.
I see you tried some smudging here to. Maybe try messing with the smudging settings a little bit to get better blending.