Sorry, I must check in here as another member of the "Self-confidence? What's that?" club.
With that, it is true that in the past I successfully functioned at a certain level for some time without any sense of self-confidence. It wasn't easy and what limited successes I had then did not feed or rebuild my self-confidence.
You, Justfloating, are youthful and have a boundless passion for writing. Your chances for gaining a healthy sense of self-efficacy are great.
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My dog

mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.