It is simple. You will need a source- I would start with old technology a CD player. an Amp, I would choose one with the amplification ability in it and the control over the amplification and a few other tghibgs, this is called an integrated amp. and you need speakers.
So go to a Stereo store with your favorite music -acouple of things,(no home theater if possible) esp. a store that sells used gear . Then Listen to as many speakers as you can using the same same set up. Go home don't buy anything. Come back and narrow it down , and pick one. Then do the same for the integrated amp. Then the source.
That's your starter system.
Or you could buy what a Magazine tells you to buy but I wouldn't do that.Good Luck and Happy Listening