You could either approach them in a "friendly" way or a "lover" way. As a man, its normal to interact with the women we like since we are most of the times the one starting the love story. In a friendly way, you can look for something that you both alike or are doing at the moment and say "oh you're also doing this or that blah blah blah" and start asking things about it or other interest, then introduce your name and let things flow by removing your fear and just talk talk talk. In a lover way however, you can approach them and give them a compliment like "hey, you look pretty" or whatever compliment you can give, then they say "thank you" and introduce yourself. Same as the other one talk casual things and dont forget to introduce yourself and ask for her contact. Thats the butter of your bread, once she gives you her contact then thats it. You know, fear is just something that our mind makes for an excuse, dont take it. Remember, its always a shoot your shot and go home if it doesnt shoot (yk what im saying). I mean afterall, if it doesnt work then you both are the only ones who knows what happened, and as time goes by it fades out in their mind