Bad writing precedes good writing. This is an infallible rule, so don’t waste time trying to avoid bad writing. (That just slows down the process.) Anything committed to paper can be changed. The idea is to start, and then go from there.
This reminds me of a bit I on saw on Facebook today, essentially that writing is a more lenient career than say, brain surgery, where you only get one chance to do it right. (Make sure your doctor is experienced!)
That’s the beauty of any art, including writing. Do what you love and what works for you. What you create can’t be wrong, though each time you do it, you’ll learn something new.
What have you started?