Start something. Finish it.
However good or bad it may be.
You need to ensure you have completed the track that you started composing or the song that you’ve begun to write.
Judge later. Don’t let self-judgment ruin your creative process. And let that not make you lazy and undisciplined.
There’s a thing called start, and then a thing called finish. Everything in between makes you the musician you are.
So, what did you start, and what have you finished?