What is your home language?
Could be easier to explain if you speak the same language as one of the senior members here...
To solve your horizon problem, just add a power fractal shader from *right mouse button*, "Create shader" -> "Displacement Shader" -> "Power fractal shader v3"
The output from that should be connected to the height field's "input". Then change the scale and displacement settings of the power fractal to 200 to start with, and edit them to something you want.