I highly recommend spending a little money on an electronic logbook program. Safelog or Logbook Pro work well.
It is the best aviation purchase I have ever made. You will be very glad to have it some day.
Do it while you are still low time and it won't take too long to fill it out.

I don't even keep a paper logbook anymore. I brought just my printed Safelog logbook to my last interview and got hired to fly an MD-80. Excel will work, but it lacks some of the best features and it doesn't look very professional.