disadvantage?

"is white an advantage? is playing black a disadvantage?"
++ Chess is a draw, but the path to the draw is wider for white and narrower for black.
"Pawn first or knight ?" ++ First pawn, then knight, then bishop, then castle, then queen.

Thank you so much for your information about the post, it gives me a broader understanding. Do you prefer black or white? As well should black mirror White?
@3
"Do you prefer black or white?" ++ White is easier and black is harder to play, but black is OK.
"should black mirror White?" ++ To some extent, yes, but you cannot keep up symmetry.
1 e4 e5 is great, 2 Nf3 Nf6 is still great, but 3 Nxe5 Nxe4? is bad: 4 Qe2 Qe7 5 Qxe4 d6 6 d4 loses a pawn, so 3...d6 is imperative.
1 d4 d5 is great, but 2 c4 c5? is bad: 3 cxd5 cxd4 4 Qxd4 loses a pawn, so 2...e6, or 2...c6, or 2...dxc4 is imperative.