16, ftm, 5'4 and weigh 200 pounds, need to lose 70 to be at a healthy weight

family can't afford healthy food and goes grocery shopping once a month, i don't really like eating anyway, i'm vegetarian because stomach can't handle meat, extreme social anxiety, depression, and chronic pain prevents me from going outside and exercising (also i'm homeschooled)

dunno what the hell to do at this point besides stop eating all together and hope i don't die