Looking for shorts / casual bottoms for warmer weather.

Spring is here, summer is coming, and I had to quit roller derby over the winter due to some health issues. That means 1) i put on some weight, which is carried mostly in the tummy/butt and boobs, minimal in the hips and 2) none of my old shorts fit me.

What types of bottoms would be flattering on a mostly rectangular body shape with a slightly pudgy tummy? Im hoping not to spend too much $$ since ill be back at sports/ working out at the end of summer, but i need some basics i can wear until then.