WP and Filezilla config file

Sorry this counts as a double post, but I’ve redefined what my problem is somewhat (very green, misunderstood where I was in the process) so I thought I’d ask more clearly here.

I’m trying to upload www.ads-software.com onto my FTP using FileZilla. I’ve followed the guides very carefully, and uploaded the wp files into the root directory “/” but when I go to https://example.com/wp-admin/install.php (in my case https://evolutionglass.com/wp-admin/install.php ) I get an error message saying:

“Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.”

I don’t know what is causing this, but I assume now that it has to do with what info I need to put in the config (wp-config.php) file.

So where do I get this info…..

Database Name
Database Name used by WordPress
Database Username
Username used to access Database
Database Password
Password used by Username to access Database
Database Host
The hostname of your Database Server. A port number, Unix socket file path or pipe may be needed as well.

…and do I need to have downloaded MySQL to complete the process?

Sorry I have very little idea how any of this works, I was not my original plan to upload my site this way ??