Installed WordPress on a domain I host, get “Missing Page” when I try to login

I bought a domain via namecheap.com, and I didn’t realize at the time that I have to buy hosting as well to install WordPress on it. So I bought hosting through namecheap, and then I used softaculous on my Cpanel to install WordPress. I was given a URL to modify my website by WordPress, website.com/wp-admin. When I go to that URL, I get a page that says “Missing Page,” and it tries to redirect me to the main URL website.com.

Any help is greatly appreciated