New to drinking, need some help with alcohol amount calculation

Hey, I turned 21 a month ago, and am trying to get into having a drink every now and then. I had a cocktail with one shot of Vodka in it, and I want to try a piña colada in the future. Research has yielded nothing, so I wanted to know if a typical piña colada has stronger alcohol than the cocktail I had. I have a bad liver, so I need to be cautious with drinks 🥲