welcome to Maya community lico0485

well im not very experienced in maya but as far as i know, you cant "set" the sky and ground in maya, like the way you set them in cinema4D, you have to "create" them in Maya


for a ground i usually create a plane ( thats enough for me most of the time)
:blush:

as a sky just make a sphere and enlarge it (around 200 units for radius will do fine) and give it a light blue color

i wud suggest u to do all the tutorials in the help files that comes with Maya

if u want to create detail skies you might want to look for few tutorials about dynamics