Hello, Invis,
We apologize for the delay in responding.
Shortocde should be added via the appropriate element – https://prnt.sc/ZX-hTNuNHd9l
Not sure why you need the div, you can add a custom class here – https://prnt.sc/4nwLTpYUXKce and write custom code here – https://prnt.sc/4nwLTpYUXKce
About sticky/scrolling effect on a custom page, check the docs of Elementor plugin and contact their support first.
If you have any additional questions or concerns, please do not hesitate to reach out to us. Our support team is always available to assist you.
Kind Regards,
8theme team