Don’t say yes until:
You understand the intended consequences.
When you understand, there are unintended consequences.
That you’ve built a system you can rely on when things fall apart.
That you have a process to push things forward.
You realize people make mistakes.
You’ve read the fine print.
If you can’t build any slack in this decision, perhaps the answer isn’t to take a step back. “Not yet” is a way to go until you’re ready.