SSL Config main server & hosted virtual servers email

NOTICE: Responses of "Hello. See my portfolio" or anything like this will be ignored. Show me in your response how well you understand what I need or do not respond!

I run a couple of unmanaged servers, each with multiple virtual servers, used by my clients for their email marketing
campaigns. I need each of these servers and all current and future virtual servers to properly employ SSL Certificates to avoid being flagged as SPAM.

I also need the PHP versions upgraded on both of these servers to 7.4.x and propagated to all the virtual servers as well.

I use Webmin as my server tool (not cPanel) running on top of CentOS 7.x. My web portals are built on the Joomla! CMS utilizing AcyMailing V5 and V6 to handle content creation and distribution, in case any of that matters here.

You should be familiar with all of these components and requirements before responding.

Also, detailed documentation of what was done will be required before payment is made. This will include step by step instructions with screen shots to make your work clearly understandable. You may or may not be the next one to work on my servers and I may need this for the next person.

Please don't be afraid to take a minute and explain your approach and your time frame. The closer this is to a technical discussion of your skills rather than a series of one-liners the more likely you and I will work together.

Good luck