Hmmm... I hope you know that you played that hand not very well...

I also hope you know your post is not easy to read and the suits of the cards would help, but let assume it is a rainbow flop, with the 4th suit on the turn. Buy-in, reads???

Why raise UTG+1, with A9s, it is not very good, but you have position. But it also commits you and may have you beat with A10 or AJ that he may limp from EP. You don't raise enough, he only have to call 300 for a 825 pot. A raise to 525 would be bettor or 600, as a general rule 3xBB + number of limper is a good line (with a stack big enough).

Why bet 150 on the flop? He has to call 150 for a 1275 pot? Do a real CB (500) or check.

Given that, a turn check is ok if you fold any river that doesn't help you, but if you are thinking of calling, I would go all-in there.

River is fine.