Played few sessions on 25 so far and players are generally more aggressive and bluff happy than 10plo. This hand is problem for me and would appreciate if you guys could help me.

PF isolate raise vs unknown which is good but when I face 3bet and call, should I just call or is 4betting also option? Or is this too good hand for turning 4bet bluff? Also I dont have reads on SB so might be best build some reads before starting 4bet bluffing + player population is new.

On flop I would assume SB cbets AdAxdx hands. UTG bets 1/3 pot and he is probably betting with 9xxx+ and draws. IMO when pot is multiway people are more towards value. I was thinking jamming but got conclusion that not enough folding equity + my pot equity is not enough when UTG calls + change SB would wake up with monster (however unlikely). Im not totally sure should I fold call or raise. I have good prize so calling is not probably too much out of line.

Turn villain checks on blank. Would shove be good here? IMO villain is not doing that with bare 9 so his range mostly contains monsters and draws.

River is 6d and I have flush now. Villain bets 1/4 pot and I have good odds to call. But however when we take account flop turn river action, its very likely villain have either flush or fullhouse and with FH hes probably not betting so small. And he is not valuebetting worse flush. So river is kinda tricky. I hit my draw, villain is almost never bluffing and I dont beat anything from his valuebetting range, but with that prize is this mandatory call?