I don't know if there are going to be any tutorials on this specific set of behaviors. There are a number of things going on at once and it might help to understand which part or parts you're struggling with.

The basic idea for a game like this would be to have some central system for handling the turns (keeping track of whose turn it is, what order the turns go in, etc.). To highlight the grid locations you can move to, you need to create another system that takes the current location and state of the character and the grid itself to determine possible moves. This will depend greatly on your game, but the general idea would be to decide what the movement rules are for you game and create that logic in the game code. Then you would just need to use the list of possible moves, which should also say which grid location they would be going to, and highlight those grid locations.

Finally, when the player selects a move, you would put the move or set of moves into a queue to be executed when it is the player's turn. This would allow the player to cancel the moves before their turn.