You need to save"export" the model in a format that irrlicht supports.
* 3D Studio meshes (.3ds)
* B3D files (.b3d)
* Alias Wavefront Maya (.obj)
* Cartography shop 4 (.csm)
* COLLADA (.xml, .dae)
* DeleD (.dmf)
* FSRad oct (.oct)
* Irrlicht scenes (.irr)
* Microsoft DirectX (.x) (binary & text)
* Milkshape (.ms3d)
* My3DTools 3 (.my3D)
* OGRE meshes (.mesh)
* Pulsar LMTools (.lmts)
* Quake 3 levels (.bsp)
* Quake 2 models (.md2)
In addition, there are exporters for popular 3D packages (Blender, 3DSMax, Gile[s], ..) included in the SDK.
But you need to be careful because not all modelers save the way others do and you need to choose a model format that supports animation if you want your model to load into irrlicht and play its animation that is if you decided to animate it.
Well first off go here to learn c++
http://www.cprogramming.com/tutorial.html#c++tutorial
And read the Learning to Program in C++ section if you have any questions you can ask them in the forums.
http://cboard.cprogramming.com/
Then you will want to come back here and read the
http://irrlicht.sourceforge.net/tutorials.html <-- irrlicht tutorials the first one will show you how to load a Quake 2 model and print text to the screen.
But seriously if you plan on building a game with irrlicht your going to need to know how to program.