Leaders have followers, managers have employees. Managers make widgets, leaders make change.
Your history of work is as important as the work you'll do tomorrow.
Anyone who says failure is not an option has also ruled out innovation.
Do the emotional labor of working on things that others fear.
If failure isn't an option, then success isn't either. Success is just failure repeated until it works.
If you wait until you are ready, it is almost certainly too late.