Can someone explain to an average joe like me how to run a node in the Tangle. Do I have to be an expert or somehow knowledgable about some kind of stuff? Or is it possible for the common people to do it??
As answered above you could go the route of using the AWS script. It's one of the current easiest routes right now.
Here's the full blog about it + some other methods:
And here's another more detailed step-by-step guide for VPS:
You can try this to set up and run a full node. https://twitter.com/romansemko/status/943375376272764929?ref_src=twcamp%5Eshare%7Ctwsrc%5Eios%7Ctwgr%5Ejp.naver.line.Share