Scoliosis can only be "fixed" with surgery, which involves spinal fusion and is a drastic intervention that permanently limits spine movement. However scoliosis tends not to cause any problems other than aesthetics and possible back pain1, and it's also fine, or even beneficial, to participate in physical activity with scoliosis2,3.
So if you haven't been told by a doctor to avoid lifting weights, then I just wouldn't worry about it. And if you have, I'd get a second opinion.
Also, anecdotally, Lamar Gant had severe scoliosis and was one of the greatest powerlifters of all time!