You have to define your goals as to what you want out of your system - do you want to play physical media? Do you want a wireless system? Do you just want to copy CDs that you have onto a disc, or do you want to "stream" from outside services? Stuff like that. Once you know what you want to do, it becomes easier. But I do agree with whomever above said to go to a dealer and let them help to realize what is possible and then you can select what you want. For me, I just like having a decent CD player and popping in a disc when I want digital music. IMO, the other stuff is a PITA, although I think it's another toy to play around with if that's what intrigues people about it.
Digital Disorientation
I have been a mid-fi guy my entire life. My current system consists of PSB Image T6 floorstanders, NAD C375 BEE int amp, NAD C546BEE CDP, and "nice" speaker cables/ICs. I have also accumulated ~400 CDs over the last 25 years. I have been looking for a book/site that explains the digital world from file formats to DACs,music streamers/players, and setting up a proper system - basically the basics on digital music. I would eventually like to migrate in that direction but need the information in order to make the right decisions. Any input would be appreciated. Thanks in advance.