Turn Based Battle System - HELP ME, PLEASE!!!

I am looking for someone who knows if there is any tutorial on the internet to create game with this system similar to the video.
I really want to make a game based on this battle system, if anyone can help me I really appreciate it.

UnderTheWitch - YouTube [TABLE]


Or do you have or know any other similar system?

I am grateful for the answer!

Not sure about tutorials, but this seems like a place to start experimenting with some stuff and see how it was made

Not sure if there are tutorials but you can have a look at my jRPG Template that is very similar to that video: