I'm trying to figure out a sticky scrolling section

Hello! I need some help figuring out how to do a sticky section on a client’s site. I want it to look very similarly to the apple product page (https://www.apple.com/shop/buy-watch/apple-watch?option.watch_cases=MNP93LL/A&option.watch_bands=MQGM3AM/A&preSelect=false&product=Z0YQ&step=detail)
Here is my read only website (Webflow - Nu-Ray Metals) you should be seeing the products page. For some reason, I just can’t get this to work. Thank you in advance! I really appreciate the help.