Is there a thing as Photographers stance?

I very recently (Wednesday) purchased the Canon Rf 75-300 , yes I read the reviews, the thing I’ve noticed so far is that I wobble like I’ve been drinking all day long. I’ve seen on YouTube others use this lens while hand holding the camera and still getting good crisp images.

Is there a particular way to stand that lessens body sway? Or any other techniques to try ? I plan on getting more hands on with the lens this weekend and trying out different settings. Any help is greatly appreciated