any good JRPG/turn based tutorials?

I'm assuming your looking for tutorials on Turn-based Combat systems like the old school Final Fantasies and Dragon Quests (Feel free to correct me if i'm wrong)

Heartbeast has a tutorials on the basics of Turn Based Combat for beginners in his Mobile RPG series

And there's always the Open RPG from the people over at GDquest. They have several videos on youtube explaining how it all works, check them out here

Unfortunately, since Godot is still a relatively new engine, there isn't much in-depth content explaining about the different types of Turn Queues and Initiative systems and how to fit them all into a cohesive frame work thats suitable as a foundation for a complete game, specifically for Godot but there is plenty on this topic for other engines / languages so with a bit of time and effort you can extract the key concepts to use in Godot.

I've been considering making a tutorial on this topic, specifically for Godot since I've already done the research and programmed the most common types in GDscript for a RPG prototypes i was making. If anyone would be interested in this, do let me know.

I would be interested in that! I've been interested in making a turn-based JRPG in Godot but have run into a lack of direction/understanding. A tutorial that recreated the systems of old final fantasy or Pokemon would be very appreciated!