Looking to selfhost a family Minecraft server for my kids and nephews. Got it running on an old media server box but it keeps crashing due to not enough RAM, even with just one test player. I was hoping to unveil it as a Christmas surprise until I hit this wall. Anyone have a ballpark for what processing and RAM a small server like this will need?

https://minecraft.fandom.com/wiki/Server/Requirements
This says 1-4GB for the application. How much is in your machine?
Minecraft is pretty lightweight.