God made life so that you have to have practical experience to grow in your ability to accomplish a task. Ministry is the same: you have to get experience to get better at your work. That means you have to begin to work or volunteer in a ministry to gain that precious experience.
In other words you can’t wait for 5 years to begin because in those five years you would have gained invaluable experience to be more fruitful in your work for the next five years. You would have lost those five years which you cannot get back. There is no reason to wait to begin at some level of activity.
Life is but a vapor. You don’t have time to waste. Commit today to being to work or volunteer for a ministry.