I grew up with the "DAY-nuh" pronunciation. It was popular in my generation for girls.
I'd find it very hard to switch to "DAH-nuh," especially since that way sounds more like
Donna to me. But I'm an old dog. Perhaps this newest generation is more open to the "DAH-nuh" way.
Dana Shalom is intriguing. It has the advantage of a big sign post saying, "Hey! I'm a Hebrew name so think twice about how you pronounce the fn." I'd definitely stick with a Hebrew mn if you decide to use the "DAH-nuh" pronunciation.