If my Daddy was sending me voice messages, personally, I'd love that! But honestly I feel like you should sit down with her (metaphorically) and ask her directly-- "babygirl, as your Daddy, I was wondering if you could tell me what would make you feel better that I could do for you on a bad day?" Read more… In the beginning of a new relationship, it's not a bad thing to talk about what she might find comforting so that you stay within the realm of her boundaries as well as likes. It's better to get direct information instead of guessing and possibly offending your sub. Consent is key in all aspects of BDSM. As for the depression part, I would give her more time to trust you and see if she brings it up herself after some more time together, otherwise I would consider bringing it up if you notice it getting worse or potentially dangerous after a bit more time. Best of luck! ♥️
