First, English is not my main language, apologize me if I make some mistakes.

I've read some books like Models by Mark Manson, I know that approaching a woman isn't so "difficult". I know the worse thing that could happen is she ignore me or start being a bitch. I know that a woman is a human being like us... But today, a girl sat by my side on the bus, I found her attractive but I didn't even iniciate a conversation.

Any tips to help me?

I understand that talking to everyone is something that helps, but I'm a little introvert, I don't get in the mood often to talk to people that doesn't attract me.