Honestly it’s not abt flirting, it’s more about showing her your genuine and that she’s safe with you. As a woman, I look for someone who makes me feel safe and who is genuine. If you focus on flirting it give off fuck boy vibes. If you are genuine and just walk up and say hey I thought you were cute do you wanna grab a coffee I’m more inclined to say yes vs if you went your shoes are cute or you have pretty hair