Good afternoon Tatiang! 
I apologise for the late reply! Thank you so much for the demo!
That was incredibly helpful for me and I understand a lot better now with the visualization. 
I tried my best to adapt this into the blocks I had. It didn’t break anything (thankfully!), but it also hasn’t accomplished it. My test brought back a few repeated tracks only a few tracks in. Is there any obvious oversight here that stands out to you?
Also, at the end of the completed list in your demo, the finale is the text : “All tracks have been played” - is there an easy way to set this process to reset my list and keep playing on a loop - so that this process happens an infinite amount of times? Always repopulating when all the played tracks are done?
Thank you again for all of your help!! This is quite a journey. 