You won't find a better combination than front squats. Not only do they train the hips for strength, but they also promote stability and form in your core and lower back. Start with kettlebells first, and then work up to a barbell if you can.
Begin with your legs hip width apart.
Grip the kettlebells in front of you and quickly stand, twisting your wrists as you come up to allow each bell to rest inside your forearm and upper arm.
Hold the kettlebells high on your chest.
Control your squat back down by keeping your core engaged and spine neutral.
With your core still braced, drive through your heels to stand back up. Be sure to squeeze your glutes at the top of your squat.