I’ve decided not to run any relay, but to run a Bridge. That’s a non-trivial thing to do.
So instead, I added the Snowflake browser extenion to Firefox but cannot see its icon so have no idea whether it’s running.
All things Tor are horrendously and technically complex. I think that’s the main reason for the low number of relays and bridges. Is there an Idiot’s guide for rookies like me?