DO IT! It's so much fun. I'm not competitive at all, but it doesn't matter, it's so fun, especially if you like people watching. Also, it's totally motivating. I wish that every time I made it a mile or so, someone on the side of the road could be there ready to cheer me on. You can walk what you can't run, plenty do at the 5ks. Never ever thought I'd be the type to like races, but they are a blast at any speed.