When would be a good time to start Prozac?

I was prescribed 10mg of Prozac. The nurse who prescribed it recommended I take it in the morning daily for 2 weeks, then I can take 2 every day for the next 2 weeks and see her again. I got the prescription filled, but haven’t started taking it yet. I have a trip coming up and I’ll be driving for 5 hours. The nurse told me that Prozac can make people sleepy so I’m not sure if that’s a risk I want to take while traveling. Should I wait til I get back to start taking it? Should I just wait until I don’t have to drive?