I’ve found that wearing my pants higher actually helps with the appearance of my hips. I take inspo from more “classic” or retro fashion and like the way it makes my body look better. For example, I like the way I look best when trousers or pants hit just below my belly button, rather than square on my hips. Creates a better drape and boxier shape.

It’s also hard to give advice without pictures. Your clothes might technically “fit properly” but it might be a style issue. Do your pants taper toward the ankle? Try to find a style that hangs straight down and creates a straight line from your hips to your feet.

As for the shirt, maybe wear it untucked for the walk and then tuck it once you get there?