SB is fish running 38.46/17.58 over 98 hands, folds to 3bets 50% of the times but this is a small sample size. folds to cbets 47% of the times.

BTN has an incredible leak where he is folding to 3bets 94% of the times over a LARGE sample size and i've been abusing the crap out of this like almost 80-90% of the times if not more. Usually if he fights back he ends up shoving preflop so it's an easy fold for me.
Merge - $0.04 NL - Holdem - 6 players
Hand converted by PokerTracker 3

SB: $4.70
Hero (BB): $7.36
UTG: $4.47
MP: $4.00
CO: $4.00
BTN: $3.24

SB posts SB $0.02, Hero posts BB $0.04

Pre Flop: ($0.06) Hero has 5 T

fold, fold, fold, BTN raises to $0.14, SB calls $0.12, Hero raises to $0.52, fold, SB calls $0.38

Flop: ($1.18, 2 players) 6 4 T
SB checks, Hero bets $0.78

Should I be cbetting here? and if he c/r shoves should I be calling?

Another hand but this time against the BTN from last hand with the large fold frequency to 3bets. As said before, he usually shoves to 3bets preflop and this is one of the rare times he calls.
Merge - $0.04 NL - Holdem - 4 players
Hand converted by PokerTracker 3

SB: $4.11
Hero (BB): $7.69
UTG: $3.28
BTN: $4.13

SB posts SB $0.02, Hero posts BB $0.04

Pre Flop: ($0.06) Hero has 8 3

fold, BTN raises to $0.14, fold, Hero raises to $0.36, BTN calls $0.22

Flop: ($0.74, 2 players) 6 4 K
Hero bets $0.37

without looking to the rest of the hand: FOLD pre

folding pre first hand might be slightly better, but folding pre 2nd hand given reads is horrible. I'm basically printing pennies (lol) with 3bets against the guy

familiarize yourself with the concept of bluffing with equity. you can wait 2 hands and do the same thing with cards that are at least suited.