Yes, I am a busy man, but not so busy I could not have found the time to open the box and install the printer. For some reason, I have been procrastinated all my life.
I am aware of Blender and I already downloaded it and installed it on my Linux laptop. I will have to learn how to use it.
The two extruders take different colors, but I don't think you can mix ABS and PLA, which are, if I understand correctly, the two materials that can be used by this 3D printer.