Armor drawing is an art where you can let your imagination run wild! Firstly, try sketching a basic human figure and then imagine the armor around it. Use simple shapes - cylinders, circles, rectangles to mark the major parts like gauntlets, pauldrons, cuirass etc. Study imagery or actual pieces of armor to understand how they work. Don’t forget shadows and highlights to add a 3D effect. Have patience, practice a lot and soon you will see improvement in your art.