How do I win this endgame?

No chance. You're a pawn up which is sometimes enough to win in a rook ending and sometimes not. But here the extra pawn on e6 is backward and the white rook is better placed than the black one. So it's a draw
No chance. You're a pawn up which is sometimes enough to win in a rook ending and sometimes not. But here the extra pawn on e6 is backward and the white rook is better placed than the black one. So it's a draw