I thought it would be fun to do a super quick low poly figure like I think you you want to do. It’s only 600 vertices or so. As you can see, I didn’t spend much time on the paint job! Here it is with smooth shading turned off:
And with smooth shading turned on (surprisingly not awful!)
To paint a low poly figure like this you need to use UVs (look for nomad UV tutorials on YouTube) and the whole thing would look way better if you use photos to texture paint the clothes (I only used photo for face)
You also need to use the techniques described in this link to create the actual figure (practise extruding faces to get quick) Jim’s sculpt’s - #23 by jim1234
Low poly in Nomad is tricky to begin with; take time experimenting with the individual techniques described above before attempting a full figure. All the best.