Something I like prescribing for newer guys as a very low-pressure but high-impact and really quite easy opener is something I’ve begun referring to as “Indirect Direct”, for lack of a better term.
Your run of the mill, general indirect opening – or, engaging a woman in conversation under pretenses other than that you’re interested in her – is a common choice among men. It feels less scary and less like the man is putting himself on the line.
It’s also far less effective than your run of the mill, general direct opening.
Women respond best to men who state – either explicitly or implicitly – their interest. Men using indirect do not do this. And, while they may not realize that women realize what they’re doing, unless a girl is completely clueless, chances are she probably does. And the man looks less for having masked his interest. He looks scared.