Setting up WordPress accounts

Hello, I have set up my website, but for some reason when I add a login widget to my page it won’t stay there when I log out. I want people to be able to register to the website, which leads me to my next question. I can’t figure out how to add a comment section to my pages. I have already allowed comments but nothing shows up under the post. My website is, thewellsblog.com . Thank you!