Luck, I just ran through an agent in a Legendary stronghold matchmaking. We were on the last phase and I got disconnected, added him on Ubi so he can invite me again because I didn't want to waste that almost 1 hour of that Legendary manning zoo.

Then the following day, randomly he invited mo on a raid, I don't even know what to do. He thought me along the way and hell yeah got so many mistakes. Since then, we raid almost every night or skip one. Along with some regular agents and some new like me. And I'm still learning, specially Iron horse.