@YSIENKIEW take a look at the Couch to 5K program. It's a guided program that is designed to take someone that is completely sedentary to a 5k. IF you can already walk a 5K, running one is not that much more beyond what you can already do.
http://www.coolrunning.c om/engine/2/2_3/181.shtml R>I'm not positive, but I think there might be mobile apps that you can use to track activity and post to Twitter/Facebook, if you're into that sort of thing. That's going to be the topic of my next blog post over the holidays.