@Tae156
I was there 1989-1990.
It was an exciting time to be in that part of Europe; I can still remember the distinctive smell of Trabis as people from the GDR poured into Austria after Hungary opened their borders.
My favourite coffee house was Café Sperl: https://www.cafesperl.at/en_home.html
There is so much to see, hear, and fall in love with in Vienna. I also felt the that the city was haunted by the loss of the Jewish intelligentsia.
Recommended reading: The World of Yesterday -- Stefan Zweig
https://www.lbi.org/test/The-World-of-Yesterday/
You can reflect on all this as you travel round the city on one of the world's best public transport systems.
Do go there if you can!