scrtmstr

A cheap little keyboard is the best way to start. It will also take quite some time for you fingers to get used to playing on the keyboard/piano, because the movements are quite a bit different then when you're typing for example.
It took me about 2 years before I could play half a piece of mozart (can't remember which one). Determination is a very good skill when playing the piano.

Thanks for all the replys guys
I'm sure it's coming from inside my pc.
The inside of my PC is pretty clean, very little dust inside the case, and nothing obscuring the fans.
It's definetly not the fans, they're always running normal and make no noise at all. The GPU is often under heavy stress (lots of video editing, games etc)
I've also checked the temperatures when I've been running for quite a while, and the temperature never gets above 40C on the CPU.
The CD/DVD drive could be it, but I never use it, and there is nothing in there, so that would be a bit strange.

RIP Steve Jobs. Brilliant man, although I was never a great fan of Apple.
also,

most smartphones do that nowadays

It looks like a pretty good deal. My pc was around €600,-, and it will be outrun by that pc.

You should also keep in mind that this pc isn't upgradable, because the case is so damn small. You can't get anything in there. Everything that's in it right now barely fits in there. That was also something to considder.