There are many sources where you can learn. I recommend to order a cheap VPS server with automatic re-installations and try to install and run scripts. Like install any free panel, after configure this panel.
You can also try to look to youtube videos, there are lot's of information.
trial and error is a good way of learning google can bring up almost anything vps related there's tons of information out there but get a test box with around 512mb ram and 10gb disk with unlimited reinstall's then just test different software try breaking it then sourcing the problem there's no better way to learn than hands on