Beneath Castle Rock

I arrive in Scotland on the 12th of September but, alas, my lease does not begin until the 13th. So a hostel it is! I booked my one night stay at Castle Rock Hostel and let me tell you, I've never been more pumped for my first lodging experience. After seeing the gore-crammed film Hostel I am forever afraid of foreign accommodations but I think this will be a far more successful stay than theirs. The hostel sits right beneath the historic Edinburgh Castle and, with that kind of view, 11GBP is a bargain.
But housing is nothing compared to my fears about one thing: food. Luckily I was clued in by my Irish friend about a place called Tesco. Apparently it is like "Costco and The Dollar UPS had a European lovechild". You order your ridiculously cheap groceries online and they are delivered to you during whatever one-hour slot you like, all for a tiny fee. You can also go directly to the store and do your own shopping but, being as fascinated as I am about this mind-boggling concept, I think I'll opt for delivery to my apartment the first day I'm there.