I am pretty sure that being a creative person means you allow new ideas.
You don´t censor your ideas, judge them, and do nothing.
Instead welcome them, consider them carefully, maybe try them, then evaluate them later.
I adore what Seth Godin wrote:
Don´t try to create and analyze at the same time. John Cage pointed out they are different processes. Doing one will interfere with the other. What will you create today? You can analyze it tomorrow.
This is true for new sentences in Spanish.
If you spend too much time analyzing, new words will never leave your mouth.
First, let the words come out of your mouth in a weird word salad. …then learn them. If you avoid the word salad, you probably won´t learn the new words.