Jackie Chan is a very good comedy/martial arts star. He does one kind of martial arts that Jet Li doesn't know how to do and Jet Li does a martial art that Jackie Chan doesn't know how to do. You can both go to two Chinese restaurants but both can have different kinds of food.

Jackie Robinson as an athlete and as someone who was trying to make a stand for equality he was exemplary.

Don't try to be like Jackie. There is only one Jackie. Study computers instead.