You usually don't edit in After Effects, you make a comp for each shot. Sometimes short sequences can be done in a reasonable way in a single comp, but most of the time your comps should just be a single shot. That said you have two options.
- Add additional cameras. After Effects will only render the top camera. All you have to do is set an in point for the new camera
- Use one camera and hold keyframes for position. This is more efficient but you may also have to use hold keyframes for point of interest, or if you are moving your camera with a null you'll need to use hold keyframes there
Unless your video is under 30 seconds, if it were my project, I'd make a separate comp for each 'shot' and then render all the comps and edit them in Premiere Pro. You could also nest your individual comps in a main comp and render that. Changes, edits, and fine tuning will go a lot faster with this workflow than creating a 10 minutes movie in a single comp.