Car cd player died..Tips for evolving to digital music?

So my beloved car cd/shuttle player died..It looks like USB is killing CDs now. Almost all new car audio is usb/ipod etc…I understand it is time to move into the digital age; (sigh) The new player I have in mind (used; from a friend) has everything. (I do not have a mp3/ipod player, or really need one. I am ok with usb.) Any tips for a dinosaur to move to digital? I would like an easy site to browse/download from, too.