The education tag seems almost as compromised as the self-learning tag, i.e. lots of questions that aren't about the education process are tagged so simply because some is [self-]educating by asking a question here.
The other two process-related tags learning and teaching haven't yet been irredeemably compromised by people adding them indiscriminately to self-posed (as opposed to homework-assigned) questions. However if "self-learning" is burninated but "learning" takes its place, I fear it will become equally compromised in a rather short time-span simply because most askers don't read the tag description(s) and whoever might be policing them can't seem to keep up.
Practical issues like that aside, the genuine learning-process questions that would properly belong to "education", "learning" and "teaching" tags feel a bit outside the core mission of M.SE now that there's a whole site https://matheducators.stackexchange.com/ (ME.SE) dedicated to these pedagogical issues. So, I would suggest adding text similar to that exists for sage, mathematica, career-development and other marginal (on M.SE) topics, i.e. suggest that they are better asked elsewhere, in this case on ME.SE. And in theory, if this decision to marginalize them is made, learning and teaching could be merged into education as well, if it were not for the horrible pollution of the latter.
Also questions genuine questions about (self-)learning are often reference-requests, so I think a pointer to using that tag instead might be helpful too in learning (and in self-learning while it's still around).