Believe in yourself and believe you are good enough 

To be more confident, you should learn on how to stop standing in your own way and allow yourself to feel confident in your skills in anything that you are doing. 

Learn on how to look confident 

Try to look more confident all the time even if you don't feel confident and also you can appear confident when needed by adjusting your body language. 

Try to think positive

In order to be more confident, you should start thinking positively and you need to frame everything your mindset to start thinking positively. Oviously the answer will be more confident. 

Using goal visualization 

This is the powerful tool to get ride on the road to understand how to build confidence. When you visualize something over and over again, your mind begins to believe that it has already happened. 

Practise self loving

To be more confident, then you should learn how to love yourself. When you fall in love with yourself, you'll have confidence and it will not matter what have happens in life.