The Startup Metrics Selector

Help me choose the few metrics this startup should live by right now.

The business model and stage: [DESCRIBE]
What I'm currently tracking: [DESCRIBE OR "EVERYTHING / NOTHING"]

Provide:
1. The one metric that matters most at this stage (the "north star" tied
   to real value)
2. The 3-5 supporting metrics that explain it
3. The vanity metrics to stop celebrating
4. The healthy benchmarks for a business like mine, with a note to verify
5. How the right metrics change as the startup matures

Keep me focused on the metric that reflects genuine value creation, not
the one that's easiest to grow.