The official Irrlicht tutorials can be found on the the official Tutorial page on sourceforge.net. You can find even more code and examples on this wiki in CodeSnippets

Getting Started

Full Irrlicht beginner tutorials

General Irrlicht tutorials

Irrlicht Engine modding tutorials

Irrlicht and third party libraries

Irrlicht and Jirr

irrEdit Irrlicht plugins

Seamless World Tutorials

Tutoriales de Irrlicht en español