Hey LaughingLeader!
It's all a bit more.. complex than that

. Did you created the staff? looks bit too heavy for that simple shape (252 triangles). Triangles optimization is important, even more vertices account nowadays. Once we have a good optimized mesh we need create our custom UVs, then start texturing, etc.
If I have time I would try to write a tutorial or something about the "art workflow" oriented to DOS2 (basically it works for lot of other games/engines). I'm gonna do some tests this week.
You can also contact me in Discord (Isvrada).