Too Long; Didn't Read
The Animal Crossing: New Horizons 2.0 update has been released, but some extra work needs to be done to access it. Newcomers to the title will need to at least upgrade Resident Services if they want to access the DLC, and later they'll need to complete Project K to open up the rest of the update's content. They'll also need some extra time and in-game money; The Roost only opens the day after you prepare everything for it, and Harv's Island requires a total of 700,000 bells to fully expand.
There's a lot more to discover than even the update's highlights, though. 9,000+ new items were added as a result of this new content, alongside new character interactions and even some new hidden mechanics. If you haven't gotten your hands on Animal Crossing: New Horizons yet, this update makes now the best time to do so.