Self-belief is developed from inside, it’s your power base of energy that you were born with.
Most people are unaware they have this power, this energy centre, from which all your self-belief and confidence grows. The first step to achieving your goals is to start developing your strengths within your character and develop an action plan to move forward and change. This means all the things you believe are your strengths, say for example, good manners, dependability, integrity, get up and go and tenacity to see a job finished and done well.
Like fear, joy, and sadness, doubt is part of human nature, and it needs understanding. If you want to improve yourself, you need to tame your self-doubt, not fight with it.
That means paying attention to how you react to things, understanding the root of your insecurities, and taking steps to address your fears.
Be kind to yourself. You are more capable and worthy than you give yourself credit for.