Curtain walls are a special type of wall, so they are a system family, which means that they are created in the model and there are not loadable families. We can create and modify families of the elements that form the curtain walls: mullions and curtain panels and then load them to the project, And we can customize our cut-out using void.
Hopefully, they are of some help to you too. You can suggest any tutorial to be prepared in the comment box under the videos.