Stand facing a tree or anything else that stays in it’s place and close your eyes. Walk toward it carefully and see if you can find it with your hands without opening your eyes first (start a few meters away and lengthen the distance as you progress). after a while, have a friend place a stick in your way as you progress and you have to avoid getting hurt and keep your heading. progress and add arms and legs to the obstacles you put in someone’s way as he moves toward the object (you can have a moving object as a target if it makes sound like a count or a whistle from a walking person) and finally add your body and grabs and at last pushes and pulls to the work. This is a good way to learn to relax and do the work as you have obstacles of many types in your way and to learn to keep your heading even under stress. Remember the goal of the drill is to build the mind and body and lean so avoid competition and doing harm to each other.
Do the same while squating and crawling.