Traveling to Saudi Arabia as a single woman?

I want to go to Saudi Arabia but I am a bit nervous. What's it like traveling as a single woman tourist in Saudi Arabia? Is it scary? Do I have to wear a cover like the local women do? I know that women cant travel alone in Saudi Arabia can I have a brother or cousin to travel with me? I am also non White. Will this be an issue? How do Saudi men act with women? I know that Saudi Arabia is gender segregated but still. Can the women look at men at all? If a cute guy is looking at me will I be arrested for smiling and waving back at him? I know dating is forbidden there but is this ok? Whats it like? I also plan on learning Arabic soon. Please help! :( Thanks! :)