Can sensitive people be successful too?

So i am sensitive. I am a pussy that's the best way to put it. I think too much about unnecessary shit, i get easily overwhelmed, i can't face uncomfortable tasks and the list goes on. And before somebody says that everyone struggles with this I know it. Everybody struggles at least a bit with discipline but some people like me have densely packed over stimulated brains so we react sensitive towards everything. Little happenings and events drift me out of the course. And since i am a great (over) thinker I figured out that you are absolutely fucked if you are sensible. Being able to take action is also related to the ability to be cold and and not as influenced by your own emotions. If i noticed one thing in common with successful people it's that they are cold and not effected much by their emotions. Being sensitive also holds me back from taking action, because i am passively afraid of the emotional consequences. I want to be successful and above average but my sensitive nature makes my doubt myself. I don't know if people like me can be high performing and great. How to callous my mind? What are tips for being cold hearted?