Its certainly a fine start!
A few comments: remove mold lines! You can paint a model as well as you like, but leaving mold lines on really ruins any paint job. The nastiest ones on yours are on the axe and shoulder.
Otherwise, it only really needs a good dousing in agrax or sepia!
When I was doing my TK, I sprayed black, then sprayed khemri brown (now baneblade brown) gave a heavy drybrush of dheneb stone, and washed it all sepia. Came out lovely.
Its a good looking unit though mate, be proud, and shade it sepia.