You need to develop the ability to read each woman's definition of masculinity, and then express that outwardly. For example when you're around a chick and you can read that she likes quiet nerdy dudes, then you can amplify that part of your personality. If she likes extroverted guys then you can amplify that part.

Other than that you need to be more physically attractive than most of the guys in your area. Either that or you need more clout/financial ambition. Know what subcultures women tend to be into and then establish yourself in that scene. I'm not much of a clout chaser and I'm not really into many hobbies so what I do is mainly physical appearance based.

In any room I'm in I'm always one of the more attractive guys. Always.

After this all you need is to approach and escalate. Once you approach the girl you instantly establish that you're making moves on her. I always go direct but if I sense that she's shy I'll be direct at first to let her know what I want, but then after that I'll just act like a friend as to not scare her. Once she gets more comfortable with me I'll amp it up. If she's a confident girl then that's even better because she knows what she wants and will make it easier for me. After that you just escalate the interaction till it ends up in your bedroom.

You just need to know that women get most of their romantic suggestions from books/movies/internet/music e.t.c. If a woman loves Harry Styles, then she's going to tend to be romantically inclined towards guys that remind her of him. That's all it is.