1. If you don't have Java Minecraft already, you'll have to buy it. Minecraft: Java Edition
  2. If you don't have Java on your computer already, install it. You'll need Java 8. There are newer versions too (11 and 17) - they won't work, you need 8.
  3. Install Multi MC
  4. Start a new Minecraft instance in MultiMC, specifying version 1.16.5.
  5. Click Edit Instance. Click Install Forge. Follow the prompts.
  6. Download Tool Leveling Mod and drag it into the Loader Mods page of that instance.
  7. Download Upgraded Netherite and drag it into the Loader Mods page of that instance.
  8. Start up the instance you made.
  9. Click Multiplayer, Add Server. Type qbaum.net in Server Address.
  10. Click Join Server
The server starts on Nov 23.

Here is info about how to use the mods in use on this server. Be sure to get the actual mods from the link above instead of from these websites, to ensure you use the right version.