apache - 301 redirect in apace.conf, non-www to www AND http:// to https://

I am trying to send all traffic to https://www.example.com without using RewriteEngine, because it is a heavy solution.

I realize there are solutions out there for my problem involving .htaccess file but I am trying to do this in apache.conf in /apache2/sites-enabled

Behavior now:

UPDATE: It seems to me that Virtualhost *:443 doesn't change anything in the below conf file, I have played around with 433 sections but they don't effect the behavior on server at all.

Here is my apache.conf:

        ServerName example.com
        ServerAlias www.example.com
        .
        .
        .
        Redirect 301 / https://www.example.com/


 #added this part to fix the issue but it didn't help
        ServerName example.com

        Redirect 301 / https://www.example.com/
        .
        .



        ServerName www.example.com
        .
        .

Also, it would be great to know if there is any risks/inefficiency related to this approach.

I appreciate all your comments!