Will you lose everything you've got if you open your own restaurant? Who knows. Will unleashing your secret desire to teach tap dancing ruin your reputation as a professional wrestler? Who knows. And who cares? Unless your unknown puts you at risk of death, prison, or bodily harm, you have nothing to lose except living a dull, uninspired life.
As far as self-confidence goes, so much of social media is about approval, getting likes, comparing our lives to others' - meanwhile, confidence is an inside job: it's about how you feel about yourself regardless of what anyone else does or thinks. It's a knowing that you're human, you're flawed, and you're awesome in your own way.
Try new things, step out of your comfort zone, take risks, do things in ways you've never done them before, ask for help, surround yourself with self-actualized people, become obsessed with the fact that you have one go-round on this planet as the you that is you, and realize how precious and important it is not to squander that.