You can stretch and acclimate your knees to the sitting position, unless you have a major existing medical condition or something. It comes with time. The next

You can stretch and acclimate your knees to the sitting position, unless you have a major existing medical condition or something. It comes with time. The next thing that will come up is that zazen can be incredibly boring. (It is.) But it helps. Also, sometimes people considered authority figures act like dicks. Sometimes people cut their authority figures slack because they're "enlightened", or whatever.