Does Aampe send the message itself or will we be setting up campaigns on our system?

In its default mode, Aampe triggers messages on your behalf using your push provider API. If you use FCM, Aampe will call the FCM API whenever it needs to trigger a message to one of your users. The same goes for Braze, OneSignal, MoEngage, CleverTap, APNs and all the providers Aampe is integrated with.

That being said, Aampe also provides a Copy via API mode.