How can a disproportionate physique and knock knees be corrected?

Hello doctor,

I am an 18-year-old male, and I weigh about 187 pounds. My height is 5 feet and 9 inches. One would not think that I weigh that much just by looking at my upper body; however, when the lower body is brought into the frame, it makes sense. A relatively high percentage of my weight is distributed in my legs (unfortunately), which gives my physique an odd look, but even worse, it also gives me knock knees. So, I thought to my (uneducated) self that if I am gaining fat disproportionately across my body, then I should technically lose fat disproportionately across my body (if I were to get into a caloric deficit, of course); however, all that would result in a slowed down version of how I already look which would not be ideal.I, therefore, came up with a new theory that if I cannot gain fat proportionally, then the only other form of tissue that I could gain (anywhere I wanted) would be muscle tissue. Therefore, if I do lifting for a long enough time period and accumulate enough contractile tissue, and if I were to go into a caloric deficit, my remaining body fat (or at least a very satisfactory amount) would be gone, meaning that my physique would finally look proportioned. Living with this kind of body composition is hard because it makes fitting into certain clothes a nightmare, and it has a psychological grasp on me. Kindly help.