Once you’ve completed the PADI Open Water Diver certification course, you are eligible to take the PADI Advanced Open Water Diver course. Even though you technically could take the course immediately after your Open Water certification, I’d suggest getting in some dives before jumping right into the advanced class. Before I took the course, I had about 25-30 dives under my belt, and for me this was the perfect amount of practice to have before taking the plunge into the dep