Blender and Unity are not the same thing,
Unity is game engine, which means that its purpose is to create games, and you can program in it using C# or Javascript. But you cannot make 3d models in it.
While Blender is program for modeling mainly, you can create applications or games in it but it is not the program's main purpose.
For Unity you can create 3D model/animations, and import them but i am not sure if its compatible with Blender but, it is compatible with Maya.
I would recommend more Unity for making a Game, because it also has web support, but it requieres to install a plugin.
In the Unity Website you can find documentation and examples to help you get started.
I Hope this helps.