it is actually a bit tricky with the tutorial and documentation, as many features are still changing with every update. For me personally, it takes more time to document existing features than develop new ones. However, unified interface and controls will come with new update, so it will be definitely worth to make some tutorials. There is also a Wiki linked in first post, which could be filled with content by earlycomers.
Thank you for feedback and stay tuned for next update. Itch.io app will take care of that, once ready (hopefully June). ;-)