It doesn’t sound like OP is homeschooling in the traditional sense (that is, studying a broad range of subjects equivalent to or exceeding what other high schoolers study). He’s taking MOOC classes exclusively in math and CS, so I’m not sure I understand the “legally compliant” part.
The article doesn’t provide details about this student’s homeschooling, but since she was admitted to MIT, it’s reasonable to assume she had academic preparation equivalent to that of other applicants (MIT expects students to have studied sciences as well as humanities and social studies).
I don’t want to debate, so I’ll leave it at that. I wish the OP the very best, but I also want to be realistic about his chances.