For finding interesting articles, you can try Arts & Letters Daily: https://www.aldaily.com. Literary Hub also publishes a daily newsletter that includes some external links to articles by other publications: https://lithub.com/
Another way to find readings is by subscribing to various literary magazines and journals. Examples include Granta, The Paris Review, n+1, Ploughshares, The Kenyon Review, The Hedgehog Review, The New Yorker, The London Review of Books, The Times Literary Supplement, and many others.
For forum discussions, there unfortunately aren't too many options. You can try the following forums on Reddit: r/literature, r/TrueLit, and r/AskLiteraryStudies. GoodReads also has online discussion groups. An alternative approach is to find or create an in-person or online book club.
That would be great. Moderation is likely the toughest part. However, it’s easier when the community is below a certain size. I hope you succeed, as a website like this would be useful for many people.
But what if you want to have the articles democratically selected by a community with entertaining foibles and faults, rather than by an editorial board with names, specific tastes and a number of around twelve?