Remove sidebar? title of blog be no link?

Hey all!

for the second website i ever make, i got a blog. The website; https://www.felzmade.com/devx . Now i want to remove the sidebar on the right, the search function and the archives.

Also, when i make a blog the title is a link to where you can comment. I dont want any comments, so i want it to not-be a link ??

Thanks in advance for reading!

-Jonas ??