Confidence:

Can you feel the uncertainty when you have to deliver something from yourself. If it becomes so difficult that you can't get it over the line or maybe so nervous that you fail when you have to perform, your self-confidence is not intact, you don't believe you can, and there can be many possible reasons for this. Self-confidence can be trained and strengthened, you may have high self-esteem but low self-confidence or vice versa, they do not go together.

Self-esteem:

Insecure self-esteem often comes from childhood, but can also be influenced by life choices. Self-esteem is the foundation of knowing your worth, keeping personal boundaries intact so tolerances are not exceeded. If self-esteem is low, you cannot protect yourself. The danger of being exposed to manipulation and inappropriate life choices is high. Your self-esteem can be built by learning to take responsibility for yourself and learning your boundaries and how to express them to others. When you take back control, you gain direct joy in life.