Start a group.

It's in your account settings.

Under your pic there are tabs, select groups and there's a new group option.
Take a tree branch of a comfortable girth and length... and a paring knife. Then, whittle away at the branch until it reaches your desired shape/form and weight. Make sure you keep it well balanced, though; if you swing, the recoil between each whack should not be much. It's better to hit 5 times relatively hard, rather than to smash slowly, because if you miss on the big, slow hits you could get screwed up by your opponent.

Best of luck.