I suggest writing a few lines in lower case and in upper case letters. The movements you choose to form the letters on the page will show you your natural movement and nature.
Mikhail teaches a great drill to get to know your own movement and nature by drawing numbers and letters with your walking, with your hands and feet in the air and I like to give this drill in the push up position and allow the student to feel himself devide over many areas of awareness so he can learn to relax more and be more effective through this. If you want to relax you can do the same at your desk by writing a favorite line using your primary hand and than under it writing the same line with the other hand. This will show you how your body and mind draws the movements of the letters and allow you over time to be more aware and work even if your primary writing hand is broken or burned and so on. learning to clean ourselves from tension involves our habits too. A man once said “First our habits serve us and we end up serving them” Think about it and form your own opinion.