> Start walking, at least 8km during weekdays day, in brisk pace, you should have to take a shower after. After each walk, do a workout, pushups, chins etc. Make this a priority, and dont walk when its dark outside, you need the sunlight.

That's over 90 minutes walking every weekday plus time for the workout and clean-up after. Difficult to make time for and rather unpleasant in rain, bitter cold, and/or snow. There's currently 9 1/2 hours of daylight per day here, pretty hard to work full-time, commute, and devote this much time to exercise during the day.