If you dont wont to model anything find free modular scene and start playing with it its like lego blocks[example below] and if you need custom models there are asset stores or pre made library with models both free and payed. Unreal engine has free project with bunch of stuff inside that you could use to learn how to use…
Have to agree with Eric about the complexity of trying to start by doing this all in 3D and looking into simpler solutions like the cinemagraph workflow. The example videos are all static camera, single image backgrounds with looping animation overlays and audio effects. Most of this is fairly straightforward video editing…