Welcome to Berlin - good to hear that you arrived well in the city! The place you are staying in sounds very nice.
I would love to give you directions but I am not sure which of the two places with that name it might be? They are both not very far (= still in walking distance if you are into walking) from "Blücherplatz" where the NLC Campus is situated.
From Flottwellstraße you would ask them to show you the way to "U Gleisdreieck" where you find the "U3" to "Warschauer Straße" which brings you to "Hallesches Tor" in just two stops (ticket "Kurzstrecke").
From Alte Jakobstraße you would have to find a bus stop for the bus 248 (for example "Spittelmarkt") which goes directly to the Campus (also "Hallesches Tor"). You have to take the bus heading for "Südkreuz".
It will be easiest to meet directly at the entrance of the library. Please let me know if you need more information!
Have a wonderful day (hopefully not too jetlagged ...) and see you tomorrow,
Last Wednesday I sent an email to your account to confirm your request to join my BUDDY time on Tuesday evening. As I am not quite sure if you received my message I am writing to you again here.
I will be very happy to take you and your daughter on my little stroll through Kreuzberg! Maybe we can also find a good place to sit, talk and eat before or after we indulge ourselves with the ice cream.
I planned to meet at 6 pm at the Next Library® Berlin Campus (close to the site of the Amerika-Gedenkbibliothek where I am working) in Kreuzberg. Are there any eating preferences of you and your daughter? There would be a choice between Italian, Syrian, International, Lebanese, Latin American, Japanese kitchen or even a beer garden ... it is all around the corner, but for some of the places it would be wise to make a reservation.
I am very much looking forward to meeting you next Tuesday!