Hi AnaLara,
I have used this to print architectural facade models
separate your digital file so that each material you want your print to be is a different group of objects but the item looks like you want it to be
make sure these two groups have the same origin and rotation
export two different stl files from your design software for each of the groups
open the two stl files in CURA. The files will be separate
select each of the objects and change their material by clicking the roll button on the left of the screen.
select both objects and right click
select merge models
print