@maiyannah As you saw, the Micropub specification refers to its alternative - ActivityPub: https://www.w3.org/TR/activitypub/
Based on my current knowledge, ActivityPub based on ActivityStreams would be more fun for developers :-) ... although I would need to learn more about them in order to make a choice.
My experience with Android client shows that implementation of a transport layer, including authentication and file transfers, takes major part of a new Social networking protocol adoption.