How do I visualise idea's / transform concepts from paper to an actual photograph artwork?

I lately always get stuck with visualising concepts for my photography and I don't know why or how to fix it.

The most beautiful scenerio that I could dream of is visualising myself. I am a perfectionist, an overthinker, and my mind always busy while I never show it from the outside. Let's say I want to make a series about:
1. Perfectionism
2. The chaos in my head and how people don't see this from the outside

The problem is, I don't know how to visualise these idea's. I once thought: are these too psycological? too vague?

What do you guys do to make your concepts (work)? drawing? Writing? just shooting and see what happens? Something else specific? I would love to know!!