How do you know if you feel baby?

Genevieve
This is my first pregnancy that has made it into my second trimester. I am going to be 17 weeks tomorrow and I am wondering how in the world am I supposed to know if I fee baby moving/kicking? I have absolutely no idea what I'm looking for!! And it seems like every time I try to focus and try to feel anything .. All I feel is my hand twitching from trying to stay still or my pulse in my belly (which is completely new for me) hahaha. Help?