How to make/program an AI? Is it even possible?

Im completely new even to programming in general, and I can imagine it will be a hell long journey to program my own AI. (At least I know a bit of math)

So, I am really interested in this topic and got an idea (after playing Portal 2 haha) to make a human-like super intelligence. I dont really think its possible yet, … or atleast not with my PC.

Or is it possible to program something like a human brain, what not just some algorithms that runs like a program, but can “live” , actively think and not just wait for inputs from me?

If I want to make something like this, where should I start? What programming language to learn?