How do you drink shots?

Tonight I had my third-ever drink, which was a shot of Nannerl blue curaçao with 15% alcohol. It was the only thing I drank, and I ate some chips and chocolate and drank water between sips and after finishing it. Overall it took me about 5 minutes to finish it. I told my friend about drinking it and she told me that I’ll probably black out. It’s been about an hour and a half and I feel fine (more so than I did with one glass of spritz, where I got dizzy). Did I prepare to drink right, and is there anything I should look out for or be cautious of now or the next time I drink?