Help me (a newbie) create a curriculum for a chat app

My ultimate goal is to build a private chat app for two. While I hope to learn the skill that allows me to add perhaps one bell and one whistle, I’d like to keep the app as streamlined as possible. And to build it as quickly as possible.

The beginning of my journey is pretty straightforward. I’ve just finished, Beginning Swift 2 Series and am presently working on Intermediate Swift 2 Series. Next up, iOS 101 with Swift Series.

Thereafter, do I keep plugging away according to the Table of Contents? Or are there some tutorials that would be more helpful than others in getting the app “shipped”?

Thanks in advance!