Hi.,
1) We can perform this customization and document it as per your request. It will take around 3 hrs to complete.
2) Regarding this point, confirm the flow
Course directory ( already exists ) => Course single page – remove price, buy now and start course buttons – update it with “View Class” button => View class button click => show page with filtered class listing with all the upcoming classes ( don’t you want to show the class where this course belongs to ? )
It will take around 4 hrs to complete.
3) As of now, you can achieve that as explained below.
a) In “Start Date” field you can provide first upcoming start date.
b) We have “Add Tab” option where you can provide future upcoming start dates there. Refer : http://prntscr.com/ktfimd
4) Actually each and every Class and Course you are creating acts as individual product behind. There is no product created separately to link with Class and Course.
Note : So, We will cost for this custom work. We charge $25/hour for custom works. Let us know your interest.