How can I start feeling more confident?

How can I start feeling more confident? 17m here, I need advice on how to feel more confident about my stutter. My stutter isn’t that bad, yes I do stutter from now and then and I wouldn’t say I’m fluent but I know people who have it much worse, it doesn’t affect how I live my daily life. I’ve already went to a speech therapist and she was provided me with strategies and ways to overcome it, but nothing worked. Turns out it was just an issue with my confidence, not even being scared of what other people think. Any advice?