Hi,
I am not a beginner but am currently running like one! I used to run a fair bit, longest race was a 10 miler. Always slow, only just inside 10 minute miles.
I stopped for a few years following a back problem but have been running on and off again for a couple of years now. The problem is I am just getting slower! I am 50 and not unfit (probably not fit either!).
My runs are usually in 5 - 10k region and I run 1 - 3 times a week sometimes subbing a run for the gym.
I've looked at some of the training plans on here but the problem is, I don't have a race pace and an easy pace, I just have running (slowly) and walking 
So I would like some tips on how I could get somewhere near where I was before, say 10k inside an hour. Currently it would take me about 66/67 minutes.
Help!!