3 days in Miami, what should I do?

I’m (26F) going to Miami for 3 days as I’m tagging along on my boyfriend’s work trip. I’ll be mostly alone as he will be working and I don’t have a ton of money. So I’m wondering what are some non-party things I can do in Miami for a few days solo? Also what is the safety situation for women travelling around solo in Miami? Any info is much appreciated!! TIA ❤️😊