You could think that you are definitely too old to start now, because you obviously already missed decades of weightless underwater tranquility and Zen..
Or you could, as you seem to do, finally get started and join all those other divers that started way too late in (safely) enjoying this awsome activity.
Or you could, as you seem to do, finally get started and join all those other divers that started way too late in (safely) enjoying this awsome activity.