Rolex watch help for a newbie!

[Kdb]

Hi! Rolex newbie here with a question...

My Dream watch has always been to have a 36mm yellow gold gold Rolex day date 118238.
I'm a busy mom with 3 kids. The gold Rolex is quite heavy and can be showy for my casual lifestyle. It is also pricey.
I found an 15238 yellow gold 34mm date case In great condition from 2005.
I went to see it today and I was confused by the strap. I have tried on the 118238 a few times. It feels heavy and substantial. The watch I tried today the strap felt light and it moved a lot because it has the oyster rivet bracelet.
It is my first time looking at a used watch so I was hoping for some advice. Is this a good watch? I would save about $5000 buying this 15238 instead of the 118238 used.

I really appreciate any advice you can give me

Thanks!!