It is best to commit as soon as possible because this will allow you more time to mentally and physically be ready for the climb. Since climbing Ama Dablam will require a lot of effort, you should keep working toward it. We've found that people are generally more successful when they start earlier because it gives them more time to work out any potential problems, plan their personal and professional lives, and gradually build up their physical endurance and strength to prevent injury and other issues.