Add margin and make products smaller on homepage of Prestige theme

[Lhynna]

Hi, I am new to Shopify and currently using Prestige theme. I want to add margin on both sides of my homepage (below the slideshow banner) and make the products displayed a little bit smaller.
I hope someone would help me. Thanks in advance.

[Qualitycheck]

Please Share a Store url to better assist.

[Lhynna]

comforliving.com
Is it also possible to display 5 products in one row?
Thanks.