My biggest goal with learning Godot is to create new board games (for my own amusement). I want to create pick-up-and-deliver or networking games (like Ticket to Ride), and potentially add tile-placement to them (Carcassonne, for example). To do that, I need to figure out how the game can check that two places on the board are legal connections. What Godot methods should I focus on, or what tutorials might be most helpful?