https://youtu.be/boQIQnfWZwY
You need to track your calorie intake, take a slight deficit ( up to 500kcal) and eat as clean as possible, because I see that you have a problem with additional bodyfat, and when you pump the muscle beneath and the bf stays the same, the thigh only grow bigger. About exercise, light cardio (walk) is a great idea, keep doing it, but when it comes to heavy squats and lunges in your case I would do that with smaller weights or with no weights at all, but with a concentration on glutes, that meaning it will be the best to do the isolation exercise for the glutes, so you don't gain any more kvadriceps. Also, if you already have a big kvadriceps, it will be good to start doing ex for hamstrings, prior to lunges and squats. That will give you smaller thighs and a rounded butt. Good luck