New Here - One month plan

Hi,
Im Kev. Ive been emotionally binge eating for the last 3 months and put on over a stone. Im going on holiday in a months time (on my own for the first time) and I need to get rid of my big belly and chins before I go :-)
I try to do a 5k Park Run every Saturday. But thats the limit of my exercise at the moment.
I used to be fairly fit but have lost my mojo. and need motivation.
Feel free to add me as a friend - I could do with some help.