It feels like the iron pick part is kinda small. You're hitting people with a sitck and a tiny tiny iron tip, perhaps increasing it would be nice.

Congratulations on your first model! I suggest you add a normal map if you haven't already though, if done properly it can really improve the visuals of your model. Also on a few places the head of the pickaxe looks a bit blocky, you might want to bevel it to give it a smoother and more realistic look.

Normal mapping
http://wiki.polycount.com/wiki/Normal_map
https://developer.valvesoftware.com/wiki/Bump_map

Beveling (if you use Blender)
https://wiki.blender.org/uploads/thumb/b/b0/Bevel_vertex_ngons.png/600px-Bevel_vertex_ngons.png
https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/bevel.html

Feel free to ask me if you have any quesitons

Thanks Momo! Appreciate the Feedback!