It's very great work !
But it's much more difficult than one may think.
1/72 is an extremely small scale.
But that's not really a bad thing for us beginners.
But this guy is not a beginner !
At that scale, details are not as important. (facial paint and such)
Many years ago, I attempted to model some WW II German
Afrika Korps dioramas.
All I had was some 1/72 Airfix Afrika Korps troops, 4 bottles of paint, cardboard, a cup of sand from a Mississippi River sandbar
and bottle of
kindergarten white glue.
I was actually impressed with the results, but I decided I could never match the professionals.
But it was fun trying !