The (FAA) ATP/CTP course is very similar to a JOC that I'm familiar with.
Completed with L3 in Florida, the syllabus is also close to the ASA book of the same title.
However, it’s normally the ‘crusty old' instructor who adds life to the otherwise fairly meaningless content. Anything shared online would barely give you 50%, or tick the box - depends what you’re after.
Good luck.