Stick with it! Moving IS step one. I don't know your starting level of physical fitness, but start! You can do anything for a minute. If you cannot walk for 30 min. straight, work up to that, then start C25K.
Once on the program, if ever a day seems impossible, really impossible, repeat the prior day's run. Do not quit!
Give yourself the day's break between running days, but do use them to walk for 30 min. You'll train your head and body that "this IS what I do now."
My last advice is to never work out on a fasting tummy. Eat a banana or something if early in the a.m.
You CAN d