Firework Show? (Need to make some blocks disappear and appear mid game or turn on by clicking them)

So... I am creating a game to confess to someone, I am good at terrain details and things but bad at scripting. I tried youtube tutorials but they don't seem good enough or are hard to make. I found a couple of free fireworks models that look right. They are models and they go off the moment you joined and then they keep going off. My idea is if she says yes they go on ( A block could activate them or chat?) As they go on when the game started I think one way to solve it is to create a button or something that makes the fireworks appear when clicked.

For example, I found this firework and it would look nice

https://create.roblox.com/marketplace/asset/846322297/endless-fireworks

Now I know this story seems kinda crazy and things but she knows I like to work on games and she also knows I suck at scripting. I want it to be a surprise and if she says no then am ded. (We know each other in real life but I just don't feel good asking her face to face for some reason maybe because im shy.)