Como dizer "não pergunte se sou capaz..." em inglês

able

Don't ask if I know what I am doing, just tell me what you want done.
Don't ask if I can do it, just tell me what to do.
Don't ask about my qualifications, just give me the job.
Don't ask if I can get the job done, just tell me what the job is.

what about "don't ask me if I can do something, just give me a mission." ?

My personal feeling is that "mission" in English sounds very formal, very pretentious. Missions include saving the planet, ending world hunger, attacking Nazi-held Europe, going to the moon, finding a cure for cancer, finding an honest poilitician, etc. What is the mission? Selling shoes? Designing an "Open" sign for the front door? Re-organizing the mailroom?

hello guys!
thanks for answering my question.

there is no such mission. I meant you can say me to do anything. it does not matter if I'll sell shoes, as Thomas said, or will be at war. I want it to mean something in general. isn't mission appropriate if I am military?

thanks again.