Gazillion website link is broken, so.

Part 1: Go to Buccaneer Beach (Chapter 3). Use the /listen 10 times.

Part 2: In the same location, defeat the HYDRA agents until you get the "Message in a Bottle" achievement and the corresponding item.

Part 3: The same, but you have to beat the ninja in the Lowtown/Hand Tower until you get the achievement.

Part 4: Hood terminal.

Part 5: Norway.

Part 6: Wakanda one shot.

Part 7: Chapter 7.

Pseudo-Guide how get Pirate Deadpool Team-Up link