Here is a list of references for learners. I have handled some of the books before, but don't remember enough about them to give you valuable pointers. Here is the list in question. Go and learn Sesotho. I'm willing to answer a reasonable answer of questions about learning or teaching Sesotho, so keep asking. But as usual, if you can easily find it (like meanings of common words) I will not reply. But otherwise I'll be happy to.