Need help on program that uses facebook/instagram info

A client wants to have information about public instagram/facebook profiles (photos/videos published, total likes/comments) from a period of time. How do I go about doing this? I found out that some of that information is available in the website source code, but how do I use that information? Also is there any sites/services that does that already? The only ones I found only go as back as a few weeks, or only procress future posts.

I thought about automatizing the process with python, is it a good idea?

I'm new in programming, so any help is aprecciated.