300 Hours of Animal Crossing New Horizon

What my island looks like after 300 hours of gameplay:

You would think that after almost 3 months of playing that my island would look like the amazing ones featured on this YouTube channel. 

Nope. 

My island, Shinjavik (named after my 2 favorite cities: Reykjavik and Shinjuku) despite being a 5-star island is as basic as they come.

Terraforming is intimidating and so time-consuming that I've only managed to make a huge waterfall on the front of my island.

  

Certainly nothing worth writing about. How are other people doing it? Why is their island look so amazing? What's their secret?