Domain points to WP Install on host, but I want the URL to look "pretty"

Hi,

Client registered a domain with GoDaddy that points to a WP install on another host that I installed. In fact, that WP install is in a subfolder of hosting account.

I want the URL to look like it’s at https://www.mynewsite.org not https://www.mynewsite.org/mynewsite, which is how things are looking now.

I know how to do with in my hosting tools, but the domain masking makes it look like it’s at https://www.mynewsite.com no matter what link you click on.

How do make the URL look right? Is this something I do in GoDaddy? Or on the hosting control panel? Or did I just install WP wrong?

Help! Thanks!!