I just had a question about cardio

I work 8hours a day 5 days a week at walmart on maintaince just wondering if I could use that for cardio.
I read some where Too runn in the mourning before eating
but if I done that I would come home and go to work..

Should I Lift weight in the mourning after work so I would not hurt if I went home and went to sleep ( still drink some protein afterwards. then a hour before work do cardio?