One of the difficult things for new polo players is the nearside hit. Its not a natural movement. When starting it is difficult to position the arm in such a way that leads to stronger form and more control. The other day I went out and trained a horse and beyond general control there is also my ability to hit the nearside well. Practice makes perfect so I need a lot more practice!
This video really helps understand the nearside hit and how the arm and ball are positioned.