Need help for moving images and slider please

Hi everyone,

I really need help on 2 things on my site.

On the first section, I want the images to scroll left automatically.

And for the second section, I want to create a rounded rectangle with a slider to show more images. 

Im currently lost with how to do this, I tried the image gallery scroll when you creation section but it creates a new section which I don't want. Anyone knows? Please help, I'm desperate.

I have attached a screenshot on what I want. FYI, I'm working a free trial for now and will upgrade it.

Website URL: https://pear-tangerine-mf2m.squarespace.com/

Password: abc123

Thank you so much.