Setting up FastConnect (A private pipe between your on-premise network and your network inside OCI) requires typically user a partner for the actual connectivity.
3 key connectivity partners (Equinix, Megaport and Colt) have made demonstration videos on how to setup FastConnect using their networks.
- Equinix: https://youtu.be/dd8jFCMmADQ
- Megaport: https://youtu.be/IfmhyBrGn3M
- Colt: https://youtu.be/lugU2E4djBs
Besides that, if you want to learn more about OCI and Networking, I highly recommend Eli’s youtube serie on many network elements like transit routing, networking peering and in general routing traffic.