[Question] Building an Inexpensive, Aesthetic, Private Forum

Reason for Writing: I want to gather information for a friend who is a professional in the behavioral sciences.
Epistemic Status: Less than 2 hours googling how to build a forum, and a couple youtube videos

Requirements:

  1. Aesthetic

  2. Inexpensive

  3. Private

  4. Easily Setup

The goal is to create a small, private forum for discussions.

I’ve looked into discourse, not sure if that’s the best option.