No contacts on Nextcloud Talk

Hello, im pretty new on Nexcloud im trying to understand most of things. My problem is with Talk, i don’t see any of my contacts or any possibility to reach tem inside the app. I jus t se 2 options “use via link” or “new public conversation”.
I use android 7 and Tal version is 3.2.7
Thanks in advance

What happens if you klick in the “New conversation” field in the upper left corner?

I dont have that optio in android.In Lower right corner ther is a plus symbol that takes me where those “use via link” or new public conversation