There is no disadvantage to going second... in fact, in tournament games, the player to go second (white) wins about 2% more often than black does. All of black

There is no disadvantage to going second... in fact, in tournament games, the player to go second (white) wins about 2% more often than black does. All of black's first moves actually transpose, so white has the first real choice in the game, and also usually has the last move in the game, which can be an advantage.