First chess game ever

Just read an article or whatever on how to checkmate with 2 Rooks / Queen and rook.
also read about checkmating with king+rook, it will be very useful

10. Ne5 loses a piece and 11. dxe5 loses your queen
26. Bf5 is mate.
In the end you were lucky the computer didn't promote any pawns. You should play for example 57. Re1
You should learn about castling and not weakening your king position with too many pawn pushes.
As for the checkmate technique you can use a stepping technique, maybe something like this: