Need some help about a HCI report

I'm writing the requirements section of the human-computer interaction project report. This project is to build an app to solve the problem of hair loss for people with hair loss. Here are some aspects: system concept, design guidelines, system requirements, details about user experience (UX), such as UX goals, relevant metrics, and interaction scenarios. However, I have a very shallow understanding of this. Could you give me some advice? How should I write the report? Or where can I find relevant materials or templates? Thanks a lot.

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