Flirting?

Hey guys, Dimeswag here. Flirting? I don't get it. Someone please help me. I was told by a friend of mine that if I wanted something I need to flirt with it. Like a girl, a cheese burger, or maybe even a car. But I don't know how to. I never know anything to say to girls (especially this one). When it comes to this one i just say "hi" ya'know, that's it. I want to talk more  and have a vonversation with her, but I never know the right thing to say. I don't even know what flirting is. All I know is that guys or girls just shower compliments on the other person. Saying anything from your hair looks nice today, nice (idk) shoes?, or DAYUM gurl U got some nasty *** *******. I see more of the nasty *** *****. So whenever I hear the word flirting think it's rude. I say you have nice hair today or nice shoes to my friends not someone I like... Well maybe, I give compliments to be friendly not to hook up with them. I dont understand the concept. I feel if i say you have nice hair to her then it will be awkward because in her head i am sure she is thinking (that was random). In my opinion i feel it's not a necessity to flirt. Maybe to compliment but not flirt. I want to give her some space instead of being all over her with compliments like I am desperate. Please clear up the concept of flirting for me and post in the comments what you think flirting is.
- Love Dimeswag (No Homo)