Well you can check SFML, Ogre3D, Irrlitch and SDL; you can check torque too.

You can also check these tutorials:

http://www.rastertek.com/tutgl40.html

http://www.opengl-tutorial.org/

and see if you understand them.

The first one is wierd i icant understand in for example:

in thr firt ch its says "Next copy the files (usually .h, .cpp, .vs, .ps, and a data folder) into the folder it created in your project directory called "Engine/Engine"

What file?where do i get them?

its just stupid

Basically the guy provides additional data files and source code - like here: http://www.rastertek.com/gl40tut02.html - go to the bottom of the page and check under Source Code:

He's explaining how to build the project by adding the files he provides.

Rastertek s really on a lower level(basically harder), so I'd advise you to first check the 2nd tutorial site I posted:

http://www.opengl-tutorial.org/