If you are willing to purchase what equipment you need, then I'm guessing with your self posting this on the forums for help you have internet access. I need to ask, is your internet access say threw a smartphone or are you on an actual laptop or desktop computer. How are you getting access to this forum. I ask this because if you are on a laptop or a desktop computer this will change things as in how you are able to get the music you want.
Do you know what equipment you want to purchase, I do not see why you could not download your music in MP3 format, save this to a USB memory stick and depending on what equipment you purchase listen to it that way. If you wish to purchase say an SD Card, do you have say a TV set that accepts SD Cards as a way to listen to the music.
This depends on what you want to do. It will depend on what equipment you want to buy and how you have the means of downloading your music .
The question you are asking is very opened ended. What I'm saying is their could be at least half a dozen ways I can just think of off the top of my head.
Can I ask, if you are using an actual desktop computer or laptop to access this forum; are you running any version of Microsoft Windows. If so, then I don't see why MP3 cant be the format of choice.
This depends on what equipment you want to purchase and also how you want to download it \ save it \ listen to it .