Hi Joe,
Don't worry about form, the main thing is the INTENT. Everything comes from the mind, spirit, soul, whatever you call it. The brain = computer and it orders the body what to do to carry out the intent. If you KNOW what you are doing will work for you - then it will.
Eventually you will find you are able to do the exercises like Master Lin but it takes time and practice.
You do not have to be perfect, just have the intent!
Do initiate 'Small Universe' It is very powerful and will help your breathing. If I do nothing else I make sure I do Small Universe every day ( sometimes even in bed before I go to sleep!)
Love and light
Faune