Can anyone please tell me where I can get a job with little experience without flaring my body every week :(

I am 18f, I moved out on my own about 3 months before I turned 18. I have celiac disease, fibromyialgia, PCOS, and am undergoing testing for POTS. I work for a popular coffee corporation making 15.25 an hour which is great, however I cannot work enough hours to afford living on my own without putting my fibro into complete and utter overdrive. I'm almost passing out or getting EXTREMELY dizzy being on my feet for more than 10-15 minutes at a time. (Not fibro related) The amount of pain my body is in from standing for hours at a time is not manageable whatsoever. Its getting excessive and so very hard to function, its becoming a complete and utter nightmare to keep myself even present at work. I have to be standing still at work for hours at a time and my body is SCREAMING at me to slow down and I really don't know what to do anymore. Does anybody have any suggestions of jobs I could work with little experience that aren't going to require me to be on my feet for so long? I really cannot move back home with my parents unless given no other choice.