The problem with people becoming creatives, the hurdle that stands in their way, is judgment and insecurity a lot of the time. I would just reinforce that an idea is never fully formed when it first comes to mind. It’s like a little seed, and you just need to nurture it. Sometimes, it takes years, and sometimes, it takes a really short amount of time, but nothing needs to be fully formed or quote-unquote “professional” in its first iteration.