@SPalise just a word of caution here, contact-based workflows do not allow for re-enrollment based on meetings (and workarounds based on list membership are not 100% reliable).
In other words, a meeting will make a contact enroll once. You’re not building a workflow that executes the same steps for each meeting, per meeting.
If there are multiple meetings happening within the relevant timeframe, delays will not be reliable either, because of the behavior described above.
So just be aware that this is all nice and well under lab conditions (just one meeting, once) but becomes very unreliable the moment there are multiple meetings, cancelations, repeat bookings etc.