Will this be overkill or otherwise not recommended for someone who is new and just starting to learn?
My goal is to have something I can grow into, but initially I'd like to host a few VMs, game servers, and a have place to store content. I'd also like to host a PLEX server in the future as well but might buy a separate piece of hardware for it specifically down the road. Thanks in advance for taking the time to help a newbie!
Do you have a workload planned for that? Like everyone told you here, it's a powerful beast but you need to feed it. If you're planning to run a plex container and a file share, it's an overkill. Get a power efficient optiplex, or hp prodesk/elitedesk, or Lenovo Thinkcentre. Put all the ram you can, a fast SSD and a big HDD for storage, you'll be more than content, and without the guilt of killing 5 whales each time you read a pr0n file.