Ten miles is fairly long for a first-time commuter. Could you find a place about halfway where you could park your car then bike in from there?

Also, what kind of roads will you be riding on? The ride could be very nice if you've got good roads with wide, safe shoulders. Do you have a good route that can avoid traffic? Important to consider.

A VERY IMPORTANT safety accessory is a MIRROR. Get one that works. I use a Myracle Mirror on both my flatbar bike and my dropbar bike. Works very well. You will need a mirror if you ever have to take the lane or get into a left turn lane or if you need to veer around crap on the shoulder.

I agree with getting a tube - fix the flat later at home. Good lights are a must too, but just as important will be a brightly colored jacket. Or get a safety vest that road construction workers use and wear it over your other clothes.

You didn't say what kind of bike you're using. If you got a road bike, it probably has 23- or 25-mm tires on it. If possible, put 28-mm tires on it. You will notice the difference in comfort.

Good luck.