What package? I'm having trouble understanding what you're saying. All the information you've mentioned so far should be addressed by a doctor, nurse and/or nutritionist. Don't take our advice. If you're taking this drastic step, it needs to be monitored by a professional.
Everyone knows how to cook if they can make a salad or a sandwich or heat up a can of soup. If people didn't know how to cook, or order food at a restaurant or delivery, there'd be a lot of dead people. Can you pour a bowl of cereal? A glass of milk? I'm not going to go on but you really need to talk to a professional, and I mean that in the most sensitive way.