Change wp-admin

Why?

So people can’t identify if the site is a wordpress site

Why is this an issue?

To make it more professional and also change it to a more relavant name

You cannot change the wp-admin url. And I’m not sure I follow the logic of your reasons for wanting to.

Chris, Do you have users on your website who login to dashboard or they login to frontend?

If frontend only then just use this plugin https://www.ads-software.com/extend/plugins/login-with-ajax/ and you can add a nice login widget on sidebar.

And then, make the wp-admin folder to be password protected. That solves everything you need.

Cheers!

https://www.ads-software.com/extend/plugins/wsecure/