Try to get yourself an old switch from ebay to practice setting up a small network, vlans etc., and you've got a solid start.
This is what (older) millenials had to do when they wanted to play video games with their friends, no broadband internet, we moved the computer, set up a lan. Good old time. But this is how 20-25 years latter, I have basic knowledge of network, and look at puzzled Gen Z kids when I tell them to set their IP adress and ping the hardware