Ruck On, Jakko, all is looking good.  Yall are discussing the shadows and highlights from a distance, which will work just fine.  If you ever plan to go deeper, as in getting a closer finish, try using oils, just for the heck of it.  What you'll notice is there won't be any abrupt seperations between contrasts, it'll be much smoother.  It's a personal choice we all make, but that sure made my brush work easier, the paint does the work.

Ruck On, Jakko!