Write write write. But DONT throw out anything! You might find you can look back on lyrics that didn’t make the cut that you wrote earlier, and now they actually make sense in your current song
There’s a cognitive bias called the Dunning–Kruger effect. People with limited knowledge on a subject often overestimate their ability, while those with greater expertise are more likely to recognize how much they still have to learn.
Be extremely good at something. Art. Music. Writing. Cooking. Fashion. Just be good at something, my friend. I promise you no one can take this from you. In this dark place, it'll be your light.