How to prepare for "advanced" diving? We were OW certified about a year ago and now have around 30 dives in Cozumel, the Bahamas and Honduras.  In January we'll get our AOW certifications back in Cozumel and then have a trip planned in July 2020 in Bali.

Eventually (late 2020 or early 2021) we'd like to do a liveaboard in the Maldives or the Red Sea.  I keep reading that these are considered "advanced" diving locations but I'm not sure I know exactly what that means or when we'll be considered experienced enough to dive there?  Other than doing drift dives (we'll do more of in Bali and Cozumel) and getting our AOW what do we need to do to prepare?