I need to help

So I'm dating a Mormon and he invited me to church with him (keep in mind that my family isn't very religious, we believe in God but we aren't extremely religious). He's going to be speaking and blessing the sacrament so I feel like I should go but I'm honestly kinda worried to. The idea of this just puts me on my toes and terrifies me. I don't know how to make myself comfortable about this situation...