[4NL] 75s in the BU

So I was playing this hand, after trying to rebalance my ranges (I've only been back to poker for a few days)
I only have villain (SB) over ~400 hands with a sort of normal range for 4NL (23/15, with 60% fold to flop cbet, and similar stats around, though too small a sample size to make any definitive deductions)

I was wondering if opening this is standard in this position, and if a pot sized bet is right, or if I should be adjusting for position (I have been just using PSB preflop unless I'm 3-betting).

I'm also wondering about bet sizing on the flop and turn. I was thinking 1/2 pot makes sense, since there is more fold equity on a flop like this, as well as the turn, compared to other hands. Let me know any thoughts you have on the hand regarding those questions, and other things you might notice. Thanks for the help!

$0.02/$0.04 No Limit Holdem
Merge
7 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($5.21) 130bb
UTG+1 ($3.88) 97bb
MP ($4.25) 106bb
CO ($4.53) 113bb
Hero (BTN) ($4) 100bb
SB ($1.70) 43bb
BB ($1.24) 31bb

Pre-Flop: ($0.06, 7 players) Hero is BTN

3 folds, CO calls $0.04, Hero raises to $0.18, SB calls $0.16, 1 fold, CO folds

Flop:

($0.44, 2 players)
SB checks, Hero bets $0.22, SB calls $0.22

Turn:

($0.88, 2 players)
SB checks, Hero bets $0.44, SB calls $0.44

River:

($1.76, 2 players)
SB goes all-in $0.86, Hero calls $0.86