For the first round, I'll choose rock as my opening move. Rock is often a psychologically comfortable first choice for many players, as it feels "solid" and defensible. Since this is the first round and I have no prior information about my opponent's tendencies, rock provides a balanced option. If my opponent chooses scissors (which is also a common first move), I'll win this round, while a paper would result in a loss and another rock would be a tie.