Need advice! First time drinking.

Hi! I’m 20F (I live in BC Canada, 19 is the drinking age!), I have never drank before. I’ve had sips here and there of somebody else’s drink but never my own. I’ve always been afraid because alcoholism has been in issue in my family in the past, I also have some big anxiety issues so that has also kept me from wanting to drink. I have been generally uncomfortable with alcohol in general but I want to get more comfortable because it’s such a societal norm.

Tomorrow my boyfriend and his friends are going to our university’s pub, and I was invited. My boyfriend has been lightly encouraging me to get a drink of my own; now I definitely don’t want to get drunk, or even super tipsy or anything. What do you all recommend? I am completely unsure of my tolerance or how anything would make me feel. Thank you!