Leaving for Europe tonight! Spending 2 weeks there. I'm a long time lurker but y'all have encouraged me to step out of my comfort zone and just do it!!! Still need advice?

I (28/m) just graduated medical school and I'm spending two weeks in Europe with one of my fellow graduates (27m).

Overview of itinerary: ATL --> London --> Barcelona --> Rome --> Prague --> (possibly Edinburgh) --> London --> ATL

We've got a few things planned, such as an international friendly football, checking out Rome and the Vatican for a few days, and going to the trooping of the Colour in London for her majesty's birthday.

Our loose packing list is:

Passports Chargers w adapters for phone, tablet, laptop (on the fence about if I want to bring it) 1 weeks worth of close (will do laundry), including some colder wear in case London is London and cold/foggy/wet. Medications Cash (hid in different bags so we can weather a possible theft scenario) Sunglasses Toiletries Shoes (flip flops, dress shoes and waterproof tennis shoes)

Furthermore, were changing our phone plans to international. We have both hard copies as well as mobile (phone) accessible itinerary and tickets. We've downloaded what's app to save on messaging fees, mobile pass app in case a passport is stolen, hostel world app to quickly book places quickly in case anything falls through.

Four questions:

1. Whats listed above, have we covered all the bases?
2. Is Airbnb as good in Europe as it is in Europe?
3. Do you have any bucket list/cannot miss type of recommendations for the locales we are visiting?
4. We're thinking about Edinburgh Bc we wanna do a scotch distillery type thing. Will that be too much to fit into a 15 day trip?

TL; DR: plz read the post. It's not long and this is my first time outside of the US aside from the Caribbean.

Thanks y'all!!