people will share the lessons they've learned in life, but some you must experience and learn yourself to truly understand.
the best time to start is now. you may want to wait until tomorrow, until the weekend, until next week, until next month, until summer, until next semester, until next year, until the time is right. if you wait for the "right" time, you will always wait. you may never do anything. start right now. do not wait until tomorrow. the only thing stopping you is yourself, your perfection.
you will fail. you must learn from failure. you must be okay with it. you must because that is the only way you can move on. it is the only way to improve. you should want to fail, so that you can improve.