this player is a bit timid in betting but doesn't bluff (?) or play deep into hands

PokerStars Pot-Limit Omaha High, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($11.35)
Hero ($42.55)
UTG ($18.20)
MP ($23.40)
CO ($54.55)
Button ($24.65)

Preflop: Hero is BB with 7, 8, 8, A.
1 fold, MP raises to $0.85, 1 fold, Button calls $0.85, SB calls $0.75, Hero calls $0.60.

Flop: ($3.40) 7, T, A (4 players)
SB bets $1.25, Hero calls $1.25, MP folds, Button folds.

Turn: ($5.90) K (2 players)
SB bets $0.75, Hero calls $0.75.

River: ($7.40) Q (2 players)
SB bets $0.75, Hero ?

Put in a Raise?

I am finding so far that the Omaha players are either stright forward or clear donks,
Not much in between.

small sample size

At this level, I have not found good lags. Not that I'd know

Flop call is good. It is good to see what MP does before we make a move.

You should raise turn to 4$ - 4.5$. Most of the time he is just trying to buy cheap cards for his flush draw or any other draw.

Calling the turn makes it difficult for us to play the river. The way you played i just call. It is easier to act on river if we raise turn.

I prefer a small raise on the turn, but calling cannot be said to be a bad decision. You pretty much have to call the river. I have no idea what you beat, but the info is worth the call.

So only dummies like me woud weak lead here on the turn with a big hand?
I know I need to add some selective aggression.