New Year’s Eve in Berlin

ideas on where to go

For what? Shopping, sightseeing, entertainment, eating, music, theater, arts, sports, dancing, nightlife, ....?

Sounds you have no info at all. To get started check official tourist website additionally to RS TG and get some special info on NYE in Berlin. Make yourself familiar with Berlin's public transport.

Some interests would help to help you.

I'm with MarkK. It's hard to know what to recommend without knowing your interests. Since they have not appeared yet, I'll recommend The Rough Guide to Berlin, which is full of things to do in the city.

Thanks for the replies. I wasn’t very specific was I. So we have traveled to many European cities but not Berlin. I reviewed the links that were recommended and they were very helpful. Walking tours are on our agenda as well perhaps a hockey game and maybe a day trip to Dresden. A cozy jazz club would be nice.
We’re staying at the Radison Blu in Berlin.

try the timeout site: https://www.timeout.com/berlin

Jazz club recommended to me by a Berliner who is a musician: A-Trane. It's in the former West Berlin, a block away from the Savignyplatz S station -- which is a 15 min ride on S3, S5, S7, or S9 from the Hackesher Markt S station, which is a couple of blocks from your hotel. The guy who recommended it described it as cozy, and it looks like that on Google Images. I haven't made it there yet.

Walking tours. There are many options and many price points. RS has a do-it-yourself walking tour in the Germany guide (I imagine it [and perhaps more?] are also in his Berlin guide). Insider Tour gets high marks on this forum for larger group tours at a reasonable price. I like Context Travel, which offers tours led by Master's- and PhD-level guides in small groups of no more than 6 participants; obviously, cost is higher, but I find their tours thoughtful and worth the price. If a private guide is within your budget, I always recommend Robert Sommer, who was the 15-year-old son of an East German bureaucrat living in East Berlin when the Wall fell in 1989. He went on to earn a PhD in German history, with a focus on the Holocaust. He is immensely knowledgable but delivers information in a very approachable and interesting style. His personal anecdotes about life in the DDR, the fall of the Wall, and post-Reunification life in the Germany make a tour with him almost priceless.

Have a great time in Berlin! It's my favorite large city in Europe!

It is important to find a guide who is familar with German history and what that meaned for the people of Berlin. Otherwise you will not undestand the irony of the location of the Reichstag for example. Same is valid for everything that is related to Cold War or WWII. A guide who declares Kaiser-Wilhelm-Memorial Church as a memorial of WWII tells you only a third of the story. Same with meaning of Gendarmenmarkt or that Berlin had 3 walls, not only 1. I could tell you a lot of things but with the background of someone who was grown up here - sometimes I miss that in descriptions of guides which are "just" locals later moving to Berlin. But a lot of good guides out there for the basics.

Jazz Club: I second recommendation of A-Trane is an old institution in the western center, so the audience is partly little more aged. Closest to your location is B-flat. Normally you name famous Quasimodo in the same breath which is also open for other music stles. If you want to explore a little bit off beaten track ZigZag is really worth exploring. If you like vocal jazz and gospel there is a concert on Dec 29 in a new gothic church in Wilmersdorf. Kunstfabrik Schlot, Yorckschlösschen and Jazzkeller69 are further addresses with more local alternative approaches.