When I was made redundant just a year before I would have been able to retire, I asked for a redundancy package to include a course on TESOL. I loved teaching my students foe whom English was, as yet, a foreign language and was thrilled with their responses.
A few years later, I volunteered with the CAB, another very fulfilling job., having passed up a chance to train as a magistrate.
But a major regret I have is that I abandoned a course I had started on proof reading. I guess my skills in that field are similar to yours, Gagajo. In any case, if I were you - and much younger than I am now - I'd at least consider making use of those skills.