https://i.ytimg.com/vi/kAdvtLFjS1g/hqdefault.jpg This one is very important video if you wanna learn blender. And you are confused which render engine you should choose. Because Blender allows you to choose between 3 extremely powerful and great engine ( internal , cycles and ...
https://i.ytimg.com/vi/7-Of9H3R9Y0/hqdefault.jpg Blender – Cycles Render Interior light – how to set up – tutorial EN part 1. source
https://i.ytimg.com/vi/49tkGDzlCdI/hqdefault.jpg In this tutorial you will learn how to create realistic earth using Blender Cycles Render. To get more detailed result Add Bump map. source