Om Swami
How can I change my nature, such as anger, so that my actions improve?
Purify the mind to change nature
Actions follow nature, and nature is formed from the impressions of the chitta. Purify the chitta and nature changes, and actions change with it.
Come to purifying your nature, purifying your chitta (mind). Then your nature will change, and when it changes, your actions will begin to change by themselves.