I'd highly recommend following the game tutorials from start to finish and you'll learn the basics and many of the RPG mechanics that are available in ORK.
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The best way to learn right now is to take on the short game tutorial made by GIL found here :
http://orkframework.com/tutorials/game/
It covers almost everything you need to make a turn based rpg. Inventory, Quests, Dialogue, Combat...
I'd highly recommend following the game tutorials from start to finish and you'll learn the basics and many of the RPG mechanics that are available in ORK.
If you're enjoying my products, updates and support, please consider supporting me on patreon.com!