How to make a tic tac toe game using GDScript?

Text/video tutorials would be helpful. I am new to GDScript and Godot. I tried to apply the minimax algo but didn't seem to work.

I think you need to give us something that is actually done, rather than let us make something for you We can give you suggestions for modification.

I just made a simple Tic Tac Toe game that uses the minimax algorith with alpha-beta pruning. Check it out, it's all open-source: https://gitlab.com/apotaurus/minimaxalphabeta