There is probably no better way to improve your general body control, than to practise balancing postures. This is done by balancing on one leg while rolling, shoving and/or spinning balls. You can then take up different individually chosen postures and hold them shortly while practising FingerQiGong.
The first movement you shuold try while practicing FingerQiGong is walking. It´s a walking meditation, because you must completely be here and now to avoid losing a ball.
If you can lightly dance while practicing, you have attained the enlarged mastery in FingerQi-Gong. For example it´s alot of fun, to try sort of a Greek dance, because the Greeks like to hold the arms horizontally while dancing.