He reminds me alot of my first horse!! She was the short stocky type only matured to 14.2,but very versatile.I showed her in open shows in trail,halter SMS,WP barrels & poles,even did some penning.At AQHA shows we did well in trail,barrels & poles.
. I always thought she would have done well in cutting as she loved working around cows the little bit I did with her.
I think you'll do well together!,don't let his smaller stature hold you back in trying different things with him.