I guess it's a bit late but it's not too hard to select denser more durable food. Tortillas not bread, dry beans not canned, definitely not boxed and frozen, etc. It's also not against the rules to fill your belly away from home so you don't need to bring your food home. I'd say tolerate the tap water but I know some people are really sensitive about the flavor of water. Maybe get a Brita pitcher. Grocery delivery is definitely a viable option. We do E-Cart pretty often to avoid trolling through the store with our twins, the delivery service just puts those bags in a fridge truck. Or there may be a gig app for that now.

We often tell newbies to get an inexpensive bike with a lot of adaptability like a hybrid because it can be configured every which way but if you already know what you like, use it.