My first 5K was the St. Paddy's Dash Down Greenville in March 2011. My training consisted of run/walking for about 30 minutes whenever I felt like it. There were a ton of people there, about 7000 ran in the race. It really isn't a race if you want to PR. I don't remember the exact time but I knot it took about about 40 minutes to finish. It wouldn't have taken that long if we had gotten there earlier or if there had been less people. We got there late so we were at the back of the back and we were pretty much forced to walk the first mile.
The race was pretty uneventful. I was disappointed that it took so long for me to finish.