You won't need supports for the parts, especially MAYBE for the top.
Assembling & Painting
The assembling is very easy because almost everything is connected with the pins.
For the top olive, I inserted a 1.75 filament inside it, and then in the top bun.
Maybe you'll have to enlarge the holes a bit.
With these different parts, you won't have much paint to do.
In fact, only few white drops on the seeds, two black dots on the eyes and a bit of red on the olive will be required. I'm a lazy painter too :)
Import on Sketchup
I uploaded on Sketchup the original model from Quinventor, which was originally published on CC BY Licence, and exploded the parts the separate them.
After a lot of work on the software, I remixed it so you can made some kind of "kit".