There are bartender courses you can take. I bartended for 8 years. You have ggod days and bad days depending on what days you work, where you work, or what event is happening. I bartended at an arena so we had hockey games, concerts etc. Depended on the crowd. Some nights I would only make $20 and others $200.
Just go start applying. A lot of small bars will hire you with no experience because it's sooooo freaking easy working at those smaller places. It's mostly just beer, and then self explanatory drinks like jack and coke, cranberry vodka, etc.