Thanks KC
When I try to access my plugins it says “There was an error retrieving your site settings.Make sure your Jetpack is up to date” then when I click the link to the jetpack, it takes me back to that page with the error.
I’ll try to do the other suggestions, but with every help page I see, I have to go to the next help page to understand it! It feels complicated, but I shall give it a go.