Cool! Congratulations!
I think it has merit, but also think there is no reason to make it 100. There is a badge for 50 and it’s a great way to learn, regardless of if you like the song. When I took sax and trumpet lessons, no one asked me what song I wanted to play, they told me. There is huge value in learning things you don’t want to play, esp when curated by @JoshFossgreen each song has a purpose, and if you are clever you can see the purpose as you are learning.
I tapped out about half way there due to injury and then got distracted back to sax. But I still think there is value in the exercise for sure.
Just for clarity, my comment was about creating a separate thread for each song. I certainly see value in the 50 song challenge, and love that Josh made it 100 - incredible resource for his students.