No Civ has a tundra bias atm, but if you pick a civ with no bias there is a decent chance to end up there.
Having said that tundra start is often God-like. You have to go for the Stars and Sky pantheon.
If you start forest, consider going Progress for the worker speed. Chopping production is really good.
If Cinammon or Sugar, remember Market gives them a yield boost -- you don't have to rush to improve them.
On mapscripts. Communitas is a continents style map, but if you want blockier terrain, lower the sea level in the options.
Tectonics is an archipelago style map, all the terrain should be snaky. But again, you can change the settings to generate blockier landmasses.