C25K is right for this (it worked for me). It is schedule that you can follow strictly. It is achievable goal with some efforts from you. It is very satisfying to complete one more day of the program and move forward to the 5k! I did whole program on the treadmill and now just maintaining my cardio and trying lose more weight. Pushups are good, but I would stick with either C25K or 7min program, otherwise it could be too much for start.