I'll throw the tutorial up when I get back to my computer (and my internet history). It's all generated with OpenSimplexNoise, which has changed in Godot 4. All the history was just strings that I wrote in one long push.
Edit: https://www.redblobgames.com/maps/terrain-from-noise/
This and also some guidance from Candlelocks, who's game Aegea has similar map gen.
Yeah, it was exciting to make but the instant I playtested it I thought 'well this is a lot less fun than I hoped.'