In How do I learn which verb to use with an object?, a user with a medium amount of rep asked why I asked it on meta, rather than main.
The closest thing I could get to an off-topic reason in What questions are not allowed on Japanese Language SE? was the answer We don't do "how do I study X?" questions. The first paragraph of which is:
We are focused on the language itself, not educational methods or study systems. We'd rather not talk about flashcards vs sentence-memorization. We are particularly harsh on "how do I keep myself motivated?"-type questions, as these are well beyond the limits of the language.
However, the paragraph seems to be talking about how to memorise a piece of information, or how to motivate yourself, and not about how to learn something.
Are questions about learning suitable for the main web site, or only meta and chat?
Related question: Is the "learning" tag misleading?