If you want to feel more confident there are some basic things that you need to address.

Feeling stable and secure is a huge contributing factor to how we feel. So whether that's secure in our relationships, or our work , or our finances, if one of these is missing we can feel unstable, without fiorm foundations. And a house built on uneven, unstable foundations, doesn't last. What feels most stable in your life? What are you sure about and what feels wobbly? If there are things that you feel need some attention don't ignore it. Get the foundations right and then you can start building.