Sorry, I don't have an answer but this is an interesting problem. For one, kids haven't been taught to teach themselves - and most kids aren't interested in learning anyways because they don't see any incentive.
Schooling has traditionally used social pressure and a present authority figure to ensure students actually participate. Online, both of those are basically gone.
Technically, there's actually potential benefit to guiding a student into becoming self-reliant in terms of schooling (and so, obviously, in work & life). Also, we're all aware that there are countless great resources for learning online. The crux of the problem is really how to incentivize it.
I think the solution involves:
1) Getting a curriculum (solved by the school)
2) Finding good resources for learning it (takes some digging)
3) Incentivizing the learning
4) Keeping track (some kind of online tool like Notion maybe?)
Maybe a good incentive is to simply have suitable rewards for completing tasks and getting good grades. Pair that with embellishments to the curriculum - like say, you get to learn some extra stuff by watching Bill Nye - and I think you can get a kid to want to learn.
I learned Calculus entirely online and aced my exam, but that was after failing it and becoming desperate to move on. Negative incentive clearly worked for me, but I don't recommend it.