Yeh you are now going to stuff which is not necessar in the begining and can be confuzing on start.
For starting to write the esential thing is
- How to get background in script
- how to make character apear on scene
- how to make character speak, have thought bubble and narrator bubble
- how to make character do an animation
- how to make character walk
After you will know this go for more advanced stuff like how to zoom how to pan how to make more charactrs do thinkgs in same time, how to use props and overlays and so on.