How can I continue to improve my basketball skills while I have an ankle injury?

Stand and shoot. Once you can stand +/- an ankle brace, you can start sport-specific rehabilitation immediately, such as shooting without jumping, cutting, or pushing off with the injured foot. You will be able to advance as tolerated until you are cleared for normal individual drills and finally team drills once all pain with activities has resolved. Physical therapy can help guide you along a standard algorithm.
Develop upper body. Practice dribbling while seated, shoot free throws, .