Initial 1st lesson day

Currently the there are no options to make sure that the course starts on a specific day.

It would be great to have and option to select the day, so that no matter what day anyone "joins" the couse will not start till a specific day (e.g. Sunday).

This way dripping the course every 7 days means that EVERYONE joining the couse will start and get the lessons dripped on Sundays, instead of messing with the 'scheduled date' option, drip, Workflow, Zapier, etc.