Python rasterized or rendered (two different methods) to screen thru Blender would probably be the most productive.

Either Python or C# is basically newber friendly.

OpenGL or Direct3D are APIs that take time to learn in order to display 3D to screen, but if you are willing to turn your "experiment" into a dedicated hobby more long term, then you will get nice results.

There really is no quick and easy way for a beginner to make a complex coding which displays a 3D object to screen, unless you are talking extremely simple coding and object. There are some tutorials online about making console applications which are generally the simplest coding to do the job. We are not talking applications for video game consoles but console applications that use the very basic computer functions underneath to do what you want. You need to literally start much simpler than 3D and work with 2D for a while. Start with "Hello World" console application and build on that.

Start with console applications. In that sense they are relevant to your goals. Text leads to 2D objects which leads to 3D. Trying to skip stages always results in knowledge and understanding missed, often with spaghetti coding as the result. Trust me - you do not want to try to debug mangled coding.

After you get some console applications done, then consider a game engine or code more directly thru an API, OpenGL or Direct3D. You can code for 2D even with a 3D development framework.

I really do not know what you are trying to achieve with your "experiment", but you need to follow some course or tutorials and expect to learn more than you thought that you would need. If you are trying to reinvent the wheel, then don't. All the coding for 3D has been created in libraries from many developers. You will not likely match them in quality of coding.

Is the programming involved in 3D much more complex than 2D?

Yes - generally it is more complex. The 3D puts even more demand for object oriented programming. Some tutorials walk the pupil from 2D to 3D, so after you choose a language then try to find a tutorial like that.

For you to make 2D or 3D software coded from scratch will be much harder than using an existing game engine to import a 3D object and display it to screen. Game engines come with all or most of the coding libraries needed. In that case, you would choose the game engine and use the main language for it that is recommended by the developers of the game engine. Next you would make some console applications in that language. After that you would return to the game engine to create coding for 2D and eventually 3D rendering or rasterizing.

OpenGL or Direct3D are APIs that take time to learn in order to display 3D to screen, but if you are willing to turn your "experiment" into a dedicated hobby more long term, then you will get nice results.

+1

OpenGL generally gets a bad rap for being difficult to use, but for simple 3D graphics using immediate mode rendering the syntax is not overly complex and allows for lots of flexibility.