I've used the RSS feeds in the past, but I think you can follow a website too, so we'll see what we wind up doing.

Why do either?
Look at the Clay Bennet cartoon I just shared, all you get is a link with no preview, and they have no Fediverse sharing at GoComics, however if I share to Tumblr, something they do have, that previews fine, and then I can share that from the feed with the preview.

So, still got some tinkering to do.