You can take the course and, as noted, you will have an Advanced Open Water certificate at the end of the class. Just don't think that you are really an advanced diver. That takes BOTH education and experience so don't race off right after class expecting to do drift dives at night in a 40m deep wreck just because you have the card. Does that make sense? Also, some operators may allow you to do a night dive but many others would not. Some may insist that you at least do the night adventure dive portion of the APW course. I hope this helps.