Page titles, sidebar & links

Hi,

I’m using the Adelle theme and I love it, but I’ve found it very difficult to edit. I’m using a simple custom CSS plugin for editing.

Can someone tell me how to remove the page titles from all pages (like home, contact, etc.), make the sidebar wider and change the color of all of the links on my site?

My site is https://prgirldiaries.com

Thanks!