It's not that hard to learn! Not the basics, anyway.

[ And hopefully the basics should be enough for when he finds himself wielding a sword in battle - at least for now. They have a while until the next mission, after all, and a month should be enough to at least learn something. ]

And they have practice swords here on the train, so we can easily use those. [ So no one will end up accidentally injured during training. Inigo doesn't want to have to explain that to one of the healers... ]