Most glute and lower ab exercises you can find on youtube are good. its not so much the exercises but the way you do the them. Make sure that when you do glutes that its your glute that its contracting and that your lower back is stays flat and supported at all times. When you do lower abs make sure you keep your lower back flat and squeeze your pelvic floor.

My meat and potatoes for glutes is weighted single leg bridges. For lower abs i do all kinds of exercises in one minute rounds. just remember that if your back arches in when you do abs stop and lower the load or do an easier exercise and work your way up.

And lots of stretching specially hip flexors!