Widgets won't center & Disqus missing on main page

Hi everyone,

I’m posting 2 questions in regards to my website: https://www.belongwithwildflowers.com

1) I cannot figure out customization to make Disqus comments section show below every post, even when readers are at belongwithwildflowers.com + not a specific post URL. If a reader goes to the main page, they have to click on the post URL to have Disqus comments section show up.

2) Bigger Issue: I cannot figure out how to center all the sidebar widgets. Everything that I’m able to customize, I’ve added CSS/HTML to center my sidebar. However, the ‘SEARCH’ and ‘SUBSCRIBE’ areas are aligned to the left. I’ve tried over 20 different suggestions of what to add to style.css to make the entire sidebar centered.

Please help!! Thank you.

(I am using the theme called ‘Make’)