how many shots of Malibu to get tipsy??

i just turned 21 recently and weirdly enough, through college I haven't really drank all too much aside from a white claw here and there or some wine/a cocktail. I don't have any older siblings to ask about this and I don't wanna expose myself to my friends lmao. my boyfriend and I are going away this weekend and I wanna get slightly drunk so I bought a big thing of Malibu and cran+pineapple juice to mix it with. but how much Malibu am I supposed to put in a drink to actually feel something?? I've never made mixed drinks myself and I don't wanna overdo it lmao. def don't wanna make myself feel sick or anything. I don't have a shot glass but could prob get a hold of one?? thanks ladies 😂💕