Request for my forever world

I saw this on a reel a few days ago but sadly no one in the comments had the seed.

I want there to be a central “island” surrounded by water of any kind, doesn’t need to be a certain depth or anything. Then some mountains/hills around it making like a ring or bowl thing and then outside that some area to build on, and if there can be access to an ocean that would be nice!

The idea is that the central island will be the location of my main base kinda sectioned off or “protected” from the outside and it’ll have one design, say Shinto, whilst the outside world will have another design, such as medieval. If anyone wants more details feel free to ask 🙂