This tutorial that shows how to present your models both in the viewport and render in a raytrace renderer like Arnold. Add your own assets such as the free community rigs here into the Zoo Tools Pro library for Maya.
You can also see how to convert lambert shaders to the newer standardSurface shaders with Convert Shaders, setup depth of field with the Zoo Focus Puller tool and more.
Zoo Tools Pro
https://create3dcharacters.com/zoo2/
Buy Zoo Tools Pro
https://create3dcharacters.com/buy/
Free Community Rigs
Aang: https://agora.community/content/aang
Cyborg: https://truongcgartist.gumroad.com
Deadpool: http://www.3dfiggins.com/Store
Goblin: https://tvialetto.gumroad.com/
Raptor: https://marief.gumroad.com/
Wall E Lego: https://robertjoosten.gumroad.com/
Zelda: https://ernestorv.gumroad.com/