Hello, I Am Obese, 5'2", 310 Lbs. I Have Short

Hello, I am obese, 5'2", 310 lbs. I have short legs and throughout the years, my inner/backside thighs have grown big. I currently have overhangs of fat (I believe). Will these go away if I begin losing weight? Unfortunately, they are not pretty to look at. My sister-in-law thinks I have fatty tumors. I believe it is just fat that I need to lose. I don't hurt. My legs are heavy and are stressful to my knees.
I look forward to your response.