As for my first-ever job, it was as a part-time cashier at a local grocery store when I was 16. I, too, had a great experience interacting with customers and colleagues. It taught me valuable skills in customer service and handling transactions, which have been beneficial throughout my career.
I share your sentiment about the changes in the retail landscape. It's sad to see some beloved brands like Burtons and Topshop disappear from the high street. Times change, but the memories and experiences from our first jobs stay with us.