Well its a big step. You can do it. You should do it. It is one of the more demanding sectors of aviation. The fact that you are somewhat aprehesive is a good sign. I am sure you will be fine.. .. .It won't hurt your career one bit. Every senior pilot I have ever met knows that single pilot light twin IFR charter is hard. . .. .Good luck with it. I nearly did something similar but stuck with instructing in the end. In some ways I would like to have done what you are now considering.. .. .WWW