growthladder design and worflow [closed]

I want to make a growthladder but I dont know how I set this thing up.

It should be a vertical line like a ruler and when you hover over it should scale the timeline and on the right it should shows a picture of the child in that period of time.

Can anyone guide me or know how to create this?

I know it is a very complex thing here. Hope someone can help

Thnx in advance!!
Dennis

Here I upload a example I quickly build in After Effects:
growthLadder_example