The word indoctrination obviously has extremely negative connotations in today's world. And quite rightly so: in the scenarios where it is appropriate, it is describing very negative and controlling behaviour, top-down unquestioned hierarchy.
But I also am fond of the etymological roots of words/concepts.
So indoctrinate, has the word 'doctrina' encoded in it.
so a more 'general use of the word', could be to 'teach'.