There are several other posts about this, but here is the run-down.
1. Create an inbound flow that has a task as the starting.
2. Put 100 ms of blank audio for the initial greeting
3. In the task, put a transfer to ACD and again, 100 ms of blank audio for the transfer and failed prompt
4. Put a disconnect as the ending action
5. Publish
6. Add a new call route with that flow as the destination, 24/7 and add your number to that route.
That is it.