There is no real correlation between been a left side dominant and be smart or been a right side dominant one and be creative.
He is Lance Armstrong a road cyclist he is my hero, he fits perfectly in the example of fight for what you want, he was diagnosed with testicular cancer with spread in the lungs, the abdomen and the brain, he recover of all the cancers, and started again with the road cyclist races, in 1999 after just a few years of his recover, he won the Tour de France, the most important race in road cycling.
Summarizing just do what you want, never will care if you are left side dominant or right side dominant.