Keeping sizes of pages uniform and multiple images on a carousel

Site URL: https://blenny-daffodil-5dzg.squarespace.com

Password - ProdigySite2021

I want each section throughout the site to take up exactly that devices screen size. Currently, smaller laptops have the images going way beneath. How can I make it so no matter the screen size each section takes up exactly the screen size. I will happily tip you if you can help me with this.

Additionally, on the home page, there are two gallery carousels about customers and vendors. I want it to display more than 1 image at a time.

Do you mean you want EVERY section on EVERY page to be exactly the height and width of the screen?

Yes.

I think this one is a question for @tuanphan

I have emailed him multiple times and signed up for his help form and would gladly pay. Any other way to get contact?

@tuanphan posts & gets tagged a lot - I'd give them a day or 2 to see the notification.  Other wise check any of the top posters eg @paul2009