If you are suffering from any mental health problem then running will help.
Of course that if your physically able, by starting running it will give you a reason to get up and out, it will give you a focus and routine. With a great sense of achievement at the end of your run.
As you run you will have a fresh rush of adrenaline which will lift your mood, your physically condition will improve and if you run with others it is very sociable. The more you run the more you will want to run!