Hi guys, I'm raphaelvongal,I'm from Brazil and I'm a recreational player but I want to improve my game in order to play NL100 NL200 perhaps NL500 NL1000 one day.I'm pretty new on Cash Game and I just started to study online as a Pro-member from a Top Cash Game Player page to improve my Cash game. This game I was playing NL10 online and I faced this situation.Which line would be better to take? Did I play something wrong here?Maybe it was better to 4bet PF since the BTN (Fish) did a weird 3bet size? I would like to hear some constructive opinions to improve my game.

Tks and Gl at the tables

BTN: 90.5 BB Fish
SB: 119 BB
BB (Hero): 172 BB
UTG: 208.5 BB
MP: 101 BB
CO: 301.5 BB Weak Reg

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 3s As
fold, fold, CO raises to 3 BB, BTN raises to 5 BB, fold, Hero calls 4 BB, CO calls 2 BB

Flop : (15.5 BB, 3 players) 4s 6s 4h
Hero bets 6 BB, CO calls 6 BB, BTN calls 6 BB

Turn : (33.5 BB, 3 players) 5h
Hero checks, CO checks, BTN checks

River : (33.5 BB, 3 players) Qs
Hero bets 12 BB, CO raises to 63 BB, BTN raises to 79.5 BB and is all-in, Hero raises to 149 BB and is all-in, CO calls 86 BB