I am not a computer engineer or a software developer. I have never set up a server in my life. I want to set up a server on my old computer by watching videos and doing the same things that were done. Is there a video that will tell me how to set up our own server as if I were 5 years old?
There certainly are videos out there for you but you should determine some goals that you’re trying to accomplish. What kind of server? A website? An e-mail server? A local network file server? I think a good place to start as a beginner is to try to make a web server with a personal web site, but there can be a few hurdles with that. The main one is that your ISP may not offer a static IP address, meaning the IP address of your home network might change frequently. There are ways around that but it adds complexity. The fundamentals of what you’ll need to host a website from home are:
This video appears to do a good job of setting up a WAMP (windows) server: WAMP Video
But I recommend using LAMP (Linux). Although Linux may be less familiar to you, if you continue down the rabbit hole of server administration Linux will be so much more helpful to you in the long run.