Strengthening Help: my right leg weak

I was hopping that this subreddit could help me develop a routine to strengthen my right leg and hip. Lately my right knee and hip have been hurting constantly, also if you look at my legs together you are able to see the difference my rIght leg super skInny.

Story: f/21 I injured my right knee about a year ago. Went to physical therapy and the therapist told me that because of the injury my right hip had actually become weaker. I had been doing my exercises regulary but I go to school full time and also work, so its hard to get those strengthening exersices in.