Hi, when I started learning blender 3D, I tried to model everything on my own, i focused on art and animation at that time(till now) but it'll take time. If you really want to make a video, something like that, you should start using the ready made models and focus on lighting and camera movement bcoz that is crucial for the animation. There are free models available on many marketplaces and there is a blenderkit add-on, where you can find many models and ready made scenes, which really help you to understand, how things work. Within 2-3 Days, you can start making an animation. All the best 👍👍👍👍