flirting is a humiliation ritual

me and this guy have been talking for a while - not a super long time, maybe a week or two, but i told myself i would try flirting with him if our first date / unspecified hangout session went well. and it did. and i have not flirted. at all.
i feel as if that flirting is akin to a humiliation ritual.
how do you flirt with boys? with anyone? its all so foreign to me and i haven’t gotten years of experience under my belt - i really only started dating last year. i feel stupid when i flirt, my face flashes red and i get embarrassed — why would i ever say that?
so, here i am, humbly before you, asking for your help. how do i flirt?