Invited to Hasidic sat service what should I (29f) and my two kids (2f & 4m) wear? Tips?

Met a lovely woman who does a Saturday Service (her husband is a rabbi) and invited us, I told her I grew up reform but haven’t been practicing since my mother passed. What should we wear? What shoes should I wear?

Edit: I’m a nurse so I’m used to throwing on some FIGS and walking out the door.