Sorry for the week delay. What a hellish week.
Brewing beer is very simple. If you make it on small scale, it is super easy. You can either do "all grain" or not. All grain you need to extract the sugar from the barley yourself, or you can already buy the extracted syrup (which is a lot easier but does not give you much freedom to experiment). Boil the sugary thing (wort) add hops, let it ferment for 2-4 weeks, bottle it and there you have beer!
That was obviously a very oversimplified process but it is basically that.