How to get more value with two-pair

I was IP with KJ of diamonds. My question is, how could I have gotten more value out of the hand, especially on the river?

And how should I interpret his min-bets?

[converted_hand][hand_history]Poker Stars, $0.01/$0.02 No Limit Hold'em Cash, 8 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite. View Hand #18641811

CO: $1.77 (88.5 bb)
Hero (BTN): $4.97 (248.5 bb)
SB: $2.92 (146 bb)
BB: $1.22 (61 bb)
UTG+2: $4.08 (204 bb)
MP1: $1.52 (76 bb)
MP2: $1.85 (92.5 bb)
MP3: $2.37 (118.5 bb)

Preflop: Hero is BTN with J♦ K♦
UTG+2 calls $0.02, MP1 calls $0.02, 3 folds, Hero raises to $0.10, 3 folds, MP1 calls $0.08

Flop: ($0.25) 3♠ J♥ 7♠ (2 players)
MP1 bets $0.08, Hero raises to $0.26, MP1 calls $0.18

Turn: ($0.77) K♠ (2 players)
MP1 bets $0.02, Hero raises to $0.16, MP1 calls $0.14

River: ($1.09) 9♣ (2 players)
MP1 bets $0.02, Hero raises to $1, MP1 folds

[/hand_history][replayer=18641811][/replayer][/converted_hand]