Live game at the wynn 1-3 blinds with $500 buy in

I have a loose aggressive image and have played at the table for 2 hours. The game is very loose and there are a few deep stacks. players seem very fishy and willing to gamble

AsAc utg 650 stack. i open for 15 ( this sizing has been getting calls). 4 calls. flop qd6d7h. I bet 40 amd get two calls villain 1 $300 ( young passive fish) villian 2 $300 ( overplays all his pairs and draws, and is very sticky) and villain 3 $1500 makes it 400$.

No HUD in live poker so here is my read

villain 3 is a older loose player. He knows I'm a good player, and he has called my big river bet very light. He has a wide range, and overplays top pair hands. He also had been caught 3 barling air, and caught bluffing river in weird spots

What do you guys do in this spot? What do you think of my bet sizing?

This is my first post ever so please be kind, and tell me what i can do to improve