[lol1lol]

What would be a good place for a beginner to start working on a problem related to IO economics of platforms?

I've studied MITx Microeconomics course. It appears undergrad level Micro course, and a background in machine learning and software engineering.

[huitzitziltzin]

It's a hard field b/c there is not that much introductory / accessible material.

There is a recent book by Belleflamme and Peitz, which should some day be followed up by a second volume about regulation.

There is also a recent survey of the empirics by Marc Rysman and two coauthors.