Hey mate :-),
congrats for beeing a daddy now! You must be proud

Didn't know you wanted to start Mentors but I am positively surprised: you really have become a very good painter now :-)
I really love that green, the white is crisp, well done.
The Edges /wings of the front Aquilla (or how it is called) could use some brighter yellow and the skull on the backpack a highlighting.
For shading the white I would suggest lining the edges of the armour parts etc. with a very thinned light blue, only a bit more blue than the white.
The blue will help to increase the feeling of the white, also you have colours which work well together.
Of course the recesses will be black, what you have already done.
Noc