Do you have to be an alcohol connoisseur to be a bartender?

I have an interest for bartending, but have no intellect on alcohol. What types of alcohol there is, what names they go by and what they’re made of, etc. A lot of the knowledge that i don’t know comes with time+drinking. I’m only 19, I can’t legally buy drinks but like any other young adult I partake in casual drinking at parties. Usually it’s basic stuff like vodka, or drinks like mikes hard, beers, stuff like that. How much would I need to know to bartend? How do I learn all of this?