Confidence is all about who you are, as a human being, and the energy you give off. Which is why the path to “becoming” more confident has very little to do with anything external, and everything to do with getting to the root of your fears, your insecurities, and who it is you believe yourself to be in the world.
This reminded me of a passage from Thoreau’s Walden. He wrote that “if one advances confidently in the direction of his dreams, and endeavours to live the life which he has imagined, he will meet with a success unexpected in common hours.” It made me think — on a similar note — how the ‘journey to confidence’ is not so much about reaching the point where others perceive you as confident, but aligning with your dreams, and always speaking from personal truth. If you focus on that, you will become more confident by default. Because confidence, as you alluded to, is all about self-acceptance and little about social approval.