Reinstalling did the trick. And I managed to find out why I was getting the invalid login despite using the correct password (Just in-case someone needs a reference in the future). At the first installation I point the host to my actual host server ie; server.webhost-premium.xxx, reinstalled twice with the same method, still got the error, but everything worked when i keep the host as "local host".
Now I'm just playing around with the admin dashboard. Super bravo.