I've nearly finished working on the doc now. I've got a few interface diagrams mocked up and just need to complete the screen mockups with just basics of what options each holds.
I've also joined another group project using Unity to improve my skills and motivate me to keep learning it. My main task is just to design puzzle and quests but if I practice with Unity more I may be able to be a level designer too for this demo, which should be completed by May so says the project lead. Guess we'll see how that goes.