Ah I see. So the subject/practice of your meditation is what is considered advanced. i.e. metta, vipassana, samatha, etc. I read the entire article and it hardly spoke about what is considered "advanced" from the monasteries.
More contemporary dharma teachers have been willing to go into it. The jhanas is one such map.
As an intermediary step simply being able to stay with your breath for an hour while still being aware/not falling asleep is a good goal.