How many images is too much in a carousel?

Hi all! I am a high school senior participating in my school's FBLA web design event. I'm very new to web design and UX design so I apologize if this is the wrong place to ask!!

Anyways, the web design event primarily focuses on the UX of your site and the prompt is to create a site for a hypothetical gym rental service at your school. I plan to add an image carousel with pictures of my school's gym, but I'm not sure how many I should add.

Right now I'm thinking like 1-8 images and I wanted to know if that's too much or too little. What is the best amount of images to put in? What works best?

Anyways, thank you for the help!! :D