Post Install Question

I was asked to setup a webserver so some teachers can move their sites from their cloud hosted provider to an on-premise server due legal regulations. They require MySQL, MyPHPAdmin and cPanel. I would have titled this "getting started" but I was able to stand up a hyper-v CentOS server in our DMZ and I installed cPanel. I am able to connect to WHM and cPanel externally and internally. That may not sound like much but although I have 20 years tech experience I have done very little work on web servers. So here is my embarrassing question: What do I do next? A very vague question, I know. Can anyone recommend some how to's, etc...