How do you flirt?

But like, actually how? I know people always say “make eye contact and compliment them” but I literally already do that! What next? I definitely feel like my problem is that I come across too friendly, I don’t think I’m a very sensual or charming person. Flirting is very unnatural to me, generally when people flirt with me they put on ‘that voice’ but I find it so cringey and inauthentic so I don’t want to resort to that. Any advice? Really want to try and actually make moves this year rather than sit back and complain about how I’m always single lol.