How do I get custom text tones on watch, like on my phone? And how do I still get those notifications on phone while wearing watch?

Finally bought my first Apple Watch! I like it, but I hate that I don’t know who’s messaging me when I get a text message notification. With the iPhone, I set up ppl with custom text tones so I know who’s texting me when I hear the notification. Now, whenever I’m wearing the watch, my iPhone doesn’t notify me with a tone anymore. How can I turn on text notifications for both watch and phone, since it looks like I can’t customize text tones on the watch? (I like that when someone’s calling me, both the watch and my iPhone rings…how do I do that with text messaging)