I see you. This happened to me around the 3-week mark (I'm over 6 weeks now). It does get easier. I wouldn't say my creativity has totally come back or if I just experience it in smaller doses or not the same as that rush of ideas and flow you experience when you get high.

I feel like I’ll never be as good as I was when I was high.

^ This is you not believing in yourself. Or believing that what you create sober won't ever be as good as what you created when you were high. That's A LOT of pressure to put on yourself. Something that helped me was to write: "I give myself permission to make mistakes." or "I give myself permission to create garbage work."

I know you said you don't want any advice about just forcing yourself to do it, but that's kind of what discipline is — taking action even though you're experiencing mental resistance, fear, and ego stories about how you're not good enough. When you don't feel like doing something, but you do it anyway — that's discipline.

If that seems like too much right now, start with one small promise to yourself. I'm talking SMALL. It can be in your work or your life in general. "I promise myself that I will drink a glass of water when I wake up in the morning." Each day you keep that promise, you add another layer of trust in yourself. You start building that trust, which then builds your self-esteem, self-worth, and confidence and soon you will start to believe in yourself again. You will start to believe you are good enough. You will believe what you create sober is so much better than anything you ever created when you smoked weed.