Loss of a dear non-Muslim friend

Assalamu alaikum, everyone. My heart is really heavy right now and I could use some advice. A very close friend of mine passed away yesterday after fighting cancer. She wasn't Muslim, but honestly, she was one of the kindest and most genuine souls I've ever met. This has hit me, her family, and our circle of friends really hard. I've been feeling this strong need to make dua for her, maybe recite some Quran, or give charity on her behalf. But I've also heard that it might not be okay to ask for mercy or forgiveness for someone who passed away outside of Islam. I'm feeling pretty torn and honestly just heartbroken. I don't want to do anything wrong Islamically, but I also don't want to just sit by and do nothing when I cared about her so much, especially since a member of her family who's also my friend asked me to pray for her. Does anyone know what might be appropriate or beneficial to do in this situation? Jazakum Allahu khairan for any guidance.