Tips on how to style this camp collar shirt?

I got it a tall size and can't return it, and it fits me well? I was hoping to figure out some way to make it look good with proportions since it looks oversized and big. I dont think tucked in will work for the undershirt (i was thinking white but couldnt find my white tee). But looking at my current attempt at an outfit I feel like some wide fitting linen trousers would look well or maybe some brown dress pants? but I feel like there is too much white, with the biege linen trousers and the light green