You may be scared, but you need to try new things and encourage yourself to change. Success does not come to us if we do not step out of our comfort zone. You must branch out into the unknown to learn and achieve new goals.
If only I would have done this or done that, then I would be happy. Thoughts like these are hurtful and get you nowhere. The past is the past; it can not be changed. Focus on what you can do now to achieve your goals. Keep working forward and not backward.
We all need to realize the more we work together, the more we can achieve. We need to start building each other up instead of putting each other down.