If you look at the first post on there there is a link to a podcast where you learn to run 5km in 8 or 9 weeks! easy peasy it is too, been out at 8am for a 5km run [proud] I am proof and so is everyone else on there.
top tip to avoid injury, buy the best shoes you can afford. Go to a proper running shop rather than a high street chain. If you ask on that thread for somewhere near you, someone should be able to point you in the right direction.
Good luck with it all, it is fun, honest. The podcast makes it so!