50nl straight vs possible flush multiway

[Supwithbates]

Berate me, smack me, then tell me what to do differently next time:
Both villains seemed pretty bad but I hadn't been at the table long enough to get any real reads. Both had relatively passive stats.

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $104.70
<font color="black">Hero (BB): $83.20</font>
UTG: $19.50
MP: $6.75
CO: $74.50
BTN: $41.00

<font color="black">Preflop:</font> Hero is dealt J[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (6 Players)
UTG calls $0.50, MP calls $0.50, CO checks, BTN calls $0.50, SB calls $0.25, Hero checks

<font color="black">Flop:</font> ($2.50) T[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] (6 Players)
SB checks, Hero checks, <font color="red">UTG bets $1.00</font>, 2 folds, <font color="red">BTN raises to $2.00</font>, SB folds, Hero calls $2.00, UTG calls $1.00
<font color="red">Should I be folding here? I'm pretty sure that UTG is so passive he never 3bets here, but I only really have 6 clean outs...</font>
<font color="black">Turn:</font> ($8.50) 8[img]/images/graemlins/spade.gif[/img] (3 Players)
Hero checks, <font color="red">UTG bets $2.00</font>, <font color="red">BTN raises to $5.00</font>, Hero calls $5.00, UTG calls $3.00
<font color="red">This check is absolutely awful. Does bet/fold sound better? If I lead for ~7$ planning to fold to a raise, how should I proceed if either/both smoothcall?</font>

<font color="black">River:</font> ($23.50) K[img]/images/graemlins/club.gif[/img] (3 Players)
Hero checks, UTG checks, <font color="red">BTN bets $7.00</font>, Hero calls $7.00, UTG calls $7.00
Pot Size: $44.50 ($2.20 Rake)

<font color="red">after mangling turn by checking, I don't know what else to do here. I think maybe this river line is correct as played? I don't even know at this point.</font>
On the turn I have outs to hit a really weak flush that probably won't be good unless I hit my 1-outer. Maybe bet/call a minraise, but fold to anything bigger?