Advice for assembling vectors to stack and combine?

Hello. I could really use advice on options for assembling these vectors. I’ve been using freecad, but I suspect I can do this easier in studio if I can just find the workflow.

I believe that merging and assembling the base (L1) and L2 is the right first operation to get a 2-layer assembly.

Where I am struggling is to merge a yellow bee (solid) with a black bee (outline) to produce a black bee with yellow inlay. After that I want o add in white for hands and teeth, but one step at a time.

Appreciate any suggestions.

try3.3mf (224.5 KB)