Matt Colville, dungeon master and DnD 5th Edition video maker on youtube, is launching exactly the kind of magazine you're talking about. The magazines are free to his patreon subscribers (of a certain level and above) and will be for sale in the MCDM (his DnD content business) store.
https://www.youtube.com/watch?v=oid4QMMXjfs
https://www.geeknative.com/82321/arcadia-matt-colville-annou...
This would be worth checking out - I'm going to buy them to support more cool content like this.