Need Help with Trip Planning

Hey Everyone,

I'm going to be going to be studying abroad in London this summer and have been trying to plan some epic central/eastern eurotrip afterward and I need some help with deciding how many days to stay in each place. I am doing central and eastern Europe because I am on travelling around Western Europe during my study abroad time. I have never travelled in Europe before so I'm pretty clueless right now. There are so many places to visit but I have narrowed it down to a few..

1.Krakow

2.Budapest

3.Belgrade

4.Split

5.Somewhere in Italy (want to visit Italy, but there are so many cities and don't know which one to go to!)

Other considerations - Prague

Those are some of the must do's on my trip. So pretty much the plan was to do crazy shit and party in Eastern/Central Europe (trying to live life on the edge/to the fullest) + go to Italy to practice my Italian on the babes ;)

My question to those from the area (I'm from US, feel free to ask for advice if you're headed here)

What should I add to the itinerary, and how long should I stay in each city?

--The dates are August 11-August 28

-- I'm young and single, I want to party (I know Berlin and Amsterdam are must go places for partying but I am going to those after with a friend) but I'm also an explorer at heart.

Chances are I wont get to do this again, or travel in this way ever again.

Anything that's a must add to the itinerary? Festivals? Events? Must see locations? Girls?

Shout out to u/jabberwocky9063 for the post format!