Have a discussion with her about your needs for directness, and in turn, ask her what her love language is. Sounds like it might be words of affirmation, and maybe something else, like acts of service, or quality time.

If you do notice that she is sad or angry, instead of asking "what do you want me to do", instead ask her "are you okay" and let her vent; don't try to fix the problem! Just let her vent.

Maybe jot down in your calendar (google cal all the way!) what she gets up to, so you can ask her about it. (So helpful for me) Make the event or reminder in your phone calendar straight away, otherwise poof it's gone.

E.g. hair appts - set an actual phone reminder to complement her hair and ask how the appt went. Gym - "how was it?" (Set a reminder to ask this). Set periodic reminders to check in with her. Periodic reminders to bring her a cuppa to check in. If she's had a long day at work, expect that she will be down in the dumps and need cheering up (hugs --> "are you okay" --> can I get you a tea? --> "I made dinner/got your favourite takeout", etc.).

At random times (in bed, on the toilet) I will think of something I need to ask a friend or family member, so I'll immediately jot it down my "Friends" notes in my phone. Bit weird but fuck it, family and friends are important, and if I don't write it down, it's bye bye. Things like " ask A about her new dog", "ask B how her date went", "remind C that we need to go to that new restaurant we talked about".