I changed my mind
I have not written in a while, I have been quite tired as of late. Also, lacking motivation to continue with the preparation for the AAD certifcate - no idea why!
Progress thus far - One month later
I have started creating the application that I have mentioned in my previous post, but after some research I realised that it may overkill. I have started going through the Android Developer Fundamentals. I am currently about half way through the codelabs, it is rather simple and I would definately recommend it to anyone who wants to start learning Android development. I am however still quite unsure if it will be enough for the AAD.