Internal Error with /wp-admin

Hello Everyone,

I have two little problems and I am hoping you guys can help.

1. I would like to force my site to always load from example.com to https://www.example.com –

2. I cannot access my https://www.example.com/wp-admin – I get an internal error which reads:

PS: I think there might be something wrong with my .htaccess file.

………………………………………

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
Apache/2.2.22 (Debian) Server at https://www.ongwediva.com.na Port 80