Quick question to the community, does anyone have some good tools to sculpt stls or step files?

Context, I'm working on some decorative keychains and have a vector image and text I want to add to the base object. I've used aolidworks for both in the past with alright results but I've switched over to freecad this year, haven't had a lot of luck adding in there, vector image is a tracing of a dog that I was provided, it's simplified but still has a lot of components.

I did look into blender but be honest I'm totally lost using it and have no clue what I'm doing coming from parametric modeling, I'm not an artist at all, my comfort zone is functional parts usually, but was approached by a friend. I did do some mockups in prusa/superslicer where I've added my image and text as negative volumes and merged into a single part. It works but it feels like a really hacky workaround (relevant XKCD) and would prefer to do it right. Any suggestions or resources would be appreciated!

If interested, here's the mockup that I've done a few test prints on, found I needed to change the line width of my vector a few times and made some features exaggerated so they'd come out more. I've (poorly) covered some identifying text on the back, left the rest as to get a feel for what I'm trying to do, did do some rough sanding on the below pictures. There's a pocket on the top edge that accepts a keyring, it's kinda chunky, about the size of a pog slammer or a thicker poker chip.