My first observation was that the eggs are not completely covered in scales, the bottom is rougher.
This is what I used, one ordinary easter egg, packaging carton and hot glue.
Building up scales
Rady for paint
And of course, I forgot to take pictures during the paint job. In short: I painted the entire egg ocre, then I added dark brown shadows under each scale and on the bottom of the egg. I finished with gold paint on the edges of each scale.
With candy (and some of it healthy)