opengl direct3d new windows diversion project? something else?

i'm starting hobby diversion digest windows complicated 3d graphics effects. many approaching combined c++.

should i opengl direct3d graphics backend? why?

or should i processed graphics engine such ? one?

some "how started" links useful. (on presumably technology, both.)

edit - approbation i unequivocally meant direct3d, directx, interjection clarification

edit - separate out i also graphics engine such vision 3d. edited doubt simulate alternative.