Wait half an hour. Wear loose comfortable clothing, find a quiet time and location, and practise with a calm mind. Steps Two to Nine are usually only practised when one has mastered Step One. You will benefit greatly from practising Step One which is the foundation of the other steps. It usually takes at least three years to master Step One.
Closing is a key part of the practice.
It maintains the energy collected during the practice, and seals your body and protects your Qi. If you have to leave early, please make sure to do the closing procedure before you leave. If you are really rushed for time, at least rub your hands together, massage your face, yawn a few times, and concentrate your thoughts on closing.