change look(size) of reviews section + add arrows to navigate reviews section

[sondreskskfsghj]

Hey, i have 2 questions:

1. How do i make my reviews section for wider, for pc it should fill the entire screen, so it looks like this:

instead of this:

I also want it to be wider for mobile, so it looks like this:

instead of this:

Question 2: Currently i can’t navigate the reviews section on desktop, so i somehow want to add custom arrows or something similar to this

Store: https://8c2dd1-3.myshopify.com/

thanks