The facilitator sessions are 3.5 hours each Saturday, starting at 14:00 Central European Summer Time.
Group work is about 2 hours each week (exact day/time to be determined by the groups, ideally in similar time zones).
You could spend about an hour to get a general idea from additional reading and resources though of course much more when your curiosity takes you.
So the weekly minimum commitment is about 6-8 hours.
There will be an additional Sunday session once per month, so the total monthly commitment is 28 – 36 hours.