First Task: Move the Cargo
Second Task: Destroy the Scarecrows
Third Task: Destory more Scarecrows
As soon as the previous quest completes, exit the headquarters and Ser Berne will approach you. He will give you and your party a test and will at least introduce you on how pawns work in a team. Basically, you just have to complete the tasks without minding your allies. They will work autonomously.
For the first task, you and your pawns will have to move cargo crates to a delivery point within the area. Just find a crate that they're not carrying and place it within the drop off area. Next, you have to defeat scarecrows. You have to destroy them all before time runs out.
Finally, you have to take out more scarecrows; one group is immune to magic while the other is immune to physical attacks. Completing all the tasks will complete the quest.
Notes:
This an optional quest. If you don't want to do the tests, you can leave the area. However, this is the only opportunity it will be offered. Once you leave the training area, it will become inaccessible.