

This sounds like a very fun project. I also run a small local news organization and we use a company that specialize in managing small news sites (Our-Hometown.com, in case you want to give them a look). We’ve been very happy with their service for the past 25 years, so I don’t plan on leaving them any time soon, but, as a self-hoster, I’ve also spent a lot of time thinking about how I’d put together the infrastructure. I think my preference is Nginx plus Varnish for caching. Also, in case you’re not aware of it, Automattic makes a plugin for newsrooms that adds some industry-specific features (https://github.com/Automattic/newspack-plugin) that looks interesting, though I haven’t tried it.
Lee Hutchinson at ArsTechnica wrote an interesting series about hosting a weather news site in Houston that I thought was awful interesting and might be worth a read. Here’s part 1 and part 2.

Personally, I wouldn’t bother wiping the asustor. There’s nothing wrong with OpenMediaVault, but it’s not any more straight forward than TrueNAS. If you’re looking for beginner simple, maybe something like HexOS or CasaOS would be more to your liking. But that makes me wonder about Proxmox for this setup. I love Proxmox and use it extensively at home and at work. It’s incredibly powerful and flexible, but it’s a lot less hand-holdy than TrueNAS. By all means give them all a try—thats the fun—but expect a learning curve before things really click.