Starting a new job at 15wks, need advice

Tree • 💙3-15-16❤3-22-18💙3-28-19
Ok so Monday I'm starting a new job (at a gas station if that makes a difference), at home I eat all the time and if I go about an hour or a little over I start feeling funny and need to eat. well at work I will only get a 15min break in an 8hr shift. How can I get around it? We can have drinks but not sure how I'm going to get away with snacking plus there's a subway in there which is going to make it worse lol