Auto scroll to top of page / how to lock contact box width?

Hi there, I’m wondering if you can help me, and I hope I am in the right sub section of the forums, if not please let me know.

I am trying to make it so on my website I am designing; when I click the image logo on the left of the navigation bar that the page auto scrolls up smoothly. Is there any way to do this?

I was also wondering, with the contact box, I noticed you can extend the width to really extreme sizes, is there any way to prevent this?

Thank you in advance for your help.

Here is my public share link: LINK
(how to access public share link)