Seconded, I want to speak openly without fear of judgement first with the AI so when I do speak to real people I'm much more confident. I know people who are confident/shameless (a positive trait in this case) who don't mind making mistakes when speaking to real people but that's not me.
My only concern is how "correct" the tool or the AI is.
100% this. Children make mistakes all the time, but they're not afraid to, especially at the stage they're first acquiring the language. But by the time you're an adult, you're much more cautious about appearing dumb, so you hold back.
You should work on your ability to act/speak in spite of the fear of making mistakes more than your skill.
It is a fundamentally important property of society. We should not be afraid to even speak. Everyone has a different reality, mistakes are often highly relative. Richness of culture (and lack of political tyranny) comes from this interaction and lack of it is almost always bad.
My only concern is how "correct" the tool or the AI is.