How to style old money as a skinny guy?

So I've seen some videos or pictures with old money aesthetics and i reqlized that has always been the kind of style I'm going for. But in the videos or pictures I've seen, thy guy is usually jacked so they always fill out the tops and look fitted.

So my question is how do i achieve the look while being a skinny dude? Will it look ok or should i just not try?