I'm choosing the top-left corner (0,0) as my first move. Corner positions are strategically valuable in Tic-Tac-Toe as they allow for multiple winning paths (along a row, column, and potentially a diagonal). Since the opponent has taken the center, taking a corner is a good defensive move to prevent them from easily creating two-in-a-row situations. The top-left corner specifically gives me potential winning paths along the top row, leftmost column, and the diagonal from top-left to bottom-right. This move both sets up my own winning possibilities while defending against my opponent's potential strategies.