Need help girls, how would you like to be approached?

M25, IT professional, earns well. I WFH and don’t have big social circle.

Whenever I go out on cafe’s or outing and I see a girl looking at me (more than once, ofcourse), should I go and say Hi? Or it would be creepy.

I’m an introvert.

Please tell me how to approach without being a creep. I don’t want to disturb people.