How many shots of Fireball is good to start with?

im 21 and always wanted to try Fireball. this is the first time ive bought alcohol from an actual liquor store rather than the 8% stuff they sell in gas stations and walmart. usually two 25oz cans of 10% get me moderately drunk, how many shots should i take to not not overdo it?

probably a dumbass question, so feel free to laugh at me lmao