First drink

I’m planning on having my first drink soon and was wondering how much of it I should drink. I got a hard baja blast, it’s a 24 oz can and 5% alcohol. I’m about 88 lbs so I would assume it wouldn’t take much to get drunk? Feels important to add it takes a lot for my brother and sister to get even a little tipsy. Also, should I eat first? If so how long before?