I recommend getting Plains and Valleys/plateaus so the world Isn't generated by literal noise map. You won't have constant ugly hills that look ugly and are a pain to traverse
As for server config increase the food spoiling to 150%/200% slower speed and make the months last vastly longer (maybe to 24 or 30 days), but this'll make crops grow slower though.
Also get the corpse mod so players don't rage quit from seeing their items despairing right In front of them. All the items get stored within a skeleton thats player locked. (Adjustable)
If you're playing with alot of mods, give the players a backpack mod to use. Vanilla bags arn't enough for the amount of new items modded version of the game adds
https://wiki.vintagestory.at/index.php/World_Configuration
Here's the wiki for world config changing while the server is still running. You'll have to reboot the server for the changes to fully apply.