"Are you ready for this?"
Translation:Bist du hierzu bereit?
Be aware that fertig often also means ready, though: "Mittagessen ist fertig" means lunch is ready, not lunch is over.
English has a point of being "ready" which is between preparations being complete (fertig) and the next thing that happens, which German just whizzes past.
English: lunch preparation is finished, lunch is ready, now we sit down and eat.
German: Very brisk, no pause: lunch prep is finished, Mittagessen ist fertig, boom, we eat.