If this is a tutorial, then pick a simple standing figure that will cover the painting of fabrics (clothing), leather (belts, shoes), and white/yellow metals (armor, chainmail, blades, buckles), wood (gunstocks), and flesh tones (including facial features) in any combination. Basically, the basics. Leave fine uniform braiding, and whatnot for the next tutorial.
Regardless of medium - oil, acrylics, etc. - cover paint consistency and application techniques, blending, layering, wet-on-wet, drying times, etc., where applicable.
My tuppence worth...
Glen