Migrating to New Server

I host about 40 websites; mostly my marketing clients who want a leg up on great hosting without paying exorbitant rates. Our old server box is getting too “long in the tooth” and needs to be replaced. So on top of everything else in my very busy schedule, I now need to move 40 websites from one operating system (WHM/cPanel on Red Hat) over to Plesk on a Ubuntu 18 box. Fortunately the server I lease from Pixelgate.net comes with very knowledgeable and caring technical support. They certainly make it less difficult and provide instruction as well as correctly setting up the machine.