I think you have entered the board incorrectly. Black should be starting on the 7th and 8th ranks; the board shows them on the 1st and 2nd ranks.
Pawn structure generally refers to how your pawns are connected , protected and protecting pieces and positions. You have an isolated pawn on the g file (as shown). Connected pawns are referred to as "pawn islands". White has two, 2 pawns and 3 pawns and can support each other. You also have 2, one of 4 and a single, isolated pawn (already explained). You will very likely lose the d pawn. The 3 (mislabeled a-c pawns) are decent enough.
Good luck . . . and try reorienting the board.
Hello,
I was talking to my Pen pal in Turkey about chess, and I showed him a moment from one of my games. He said that my pawn structure was weak.
Here is that game moment. I was Black playing a Kings Gambit Declined, Classical Defense:
What is Pawn structure? Is it important in playing chess? It got me curious.
Jared