How about, getting some phone numbers of those just coming into the program? ie with less time than you.
Then you can call them and ask "how are YOU doing today? How was YOUR day?"
You will be doing as your sponsor asked, making 2 or 3 calls a day to other her, and you don't have to talk about your problems with them, ask them about theirs.
See you will doing your "be of service to others" and fulfilling your sponsor's request. How's that for 'killing 2 birds with one stone'? lol
It becomes easier with a lot less anxiety, when we are calling to see how someone else is doing rather than calling someone to talk about ourselves.
J M H O
Welcome to sobriety!!!!!
Love and hugs,