Few people have the confidence they really deserve, caused by faulty perception and inadequate self belief. Do some research: What have you ever been told about yourself, the good and the not so good? How trustworthy are your sources? There are people whose opinion on wallpaper or fashion you wouldn’t take but you believe implicitly anything critical they say about you. Test the evidence. Discount the inaccurate. Improve the not so good and then look at your best qualities. These are the ones to use to help you build confidence and believe in yourself.
