How to flirt with a girl?

Im bicurious and im crushing on this girl. Shes 6 years older than me and im not sure about her sexuality. Im not good with flirting since im so inexperienced in the dating world, so how do i flirt with her or what i can i say to hint that im interested without seeming too desperate or scaring her off because id still like to be friends if it didnt work out.