Yes, setting up the environment was clear, and also was showing a window.. I couldn't go further.
I skimmed through many things but as an example
I tried to port this basic code here http://wiki.lwjgl.org/wiki/LWJGL_Basics_3_(The_Quad).html
to lwjgl3 by the help of migration guide https://github.com/LWJGL/lwjgl3-wiki/wiki/2.6.6-LWJGL3-migration
Showing the window was ok but I couldn't show the quad, and since the exceptions are native I got stuck..
You may say I should use vertex buffers, yes I use them normally in my current code in lwjgl2 but I couldn't manage to port my code either. I got help from the samples in the intro package of demo-suite about vbs but I couldn't manage to handle 3d environment and camera I think.
I am aware that just a complain message without details is not much of a use, normally I would clear out problems and even try to fix if there is something I could help but I lost too much time and I don't have time and effort left to discuss the problems in detail and also I believe the problem is not something hidden, it is obvious; "newcomers" will struggle among useless documents and videos.
On lwjgl there is a nice setup document and general information, they are good but that's all. For tutorials and guide it directs to wiki https://github.com/LWJGL/lwjgl3-wiki/wiki
which just tells you to go and learn native opengl.. (I've done many things in opengl before so I consider myself who knows it but I couldn't continue with lwjgl, I might be a dummy that's ok but I guess there would be plenty of people like me) When people can't find things on official site we continue to search. I am not sure if http://wiki.lwjgl.org/
is active anymore but even if it is not we are not aware of it and spend time trying to find out something that works there. Also I couldn't find something on youtube that works for the latest lwjgl.
Anyway, the last link I sent looks promising, I hope it will do the thing.