This video goes through setting up a Virtual Machine in XenServer / XCP-ng in a lab environment. If you want to experiment with in detail with XenServer, I highly recommend you download XCP-ng from their official website.
This is a community-powered version of XenServer with ALL FEATURES ENABLED. XenServer from Citrix has recently started going away from its open-source roots and as a result, has begun locking features behind a paywall.
I live stream on Twitch and encourage you to drop in and ask a question. I regularly publish on YouTube and christitus.com, but if you need immediate assistance, check out the Terminal Cafe with Discord Invite Link.