Best dumbbell exercises for legs and glutes? Is it good to do light low-impact cardio after legs/or separate cardio days?

I have been seeing some muscle development in my legs, but I tend to carry a bit more fat at the same time so it gives a stocky look since I'm 5'2. I know diet matters, but I have a hard time eating a lot of meat for protein so some days I eat less protein than I should. I always go on the treadmill for 15-20 mins ( incline of 4.5-5, 2.0-2.5 speed) after my arm days and sometimes on my leg days even if I'm a bit fatigued, I'm unsure if this is helping tone down the fat in my legs or if I need to increase the intensity overtime.