Writing a letter to my dad who's in prison. The last and only time I wrote to him in 2 years was…

Writing a letter to my dad who's in prison. The last and only time I wrote to him in 2 years was when I was 9 weeks pregnant telling him I was pregnant. Now my son is a month old and the only thing I can think of writing is "your grandson is here, here's some pictures. Ok bye." 🙄 I have no idea what to write