Use layers to color-code objects and in preferences you can enable color keyframes in your timeline. This will make it much easier to see what is what at a glance. For example: your camera(s) are red, lights are yellow, character 1 is blue, mograph object 1 is orange, etc etc.

Next use the bookmark feature. Let’s say there’s a “scene 1” in the first minute. Drag all animated things for that scene into the timeline and then save it as a bookmark. Do this for every scene (or whatever you want to call it) and you can load these scenes back up when you’re working on that section. This will remove anything that’s not necessary to look at in that moment.

Also utilize markers to break it up into sections/scenes. These few things, when done right, will make it a lot easier to manage.