Sadly, I don’t know of one, but there is this thread about maths and computer science that has led to the creation of a few book clubs and reading sessions. I’m not sure if it’s still active, but you can definitely take a look at what’s already been done and contribute your own ideas:
Maybe some new ideas will get the discussion going again! 
Personally, I’ve tried the Progate site that was mentioned for learning Java, and while it was pretty basic in terms of difficulty (I think that the course is really meant to be accessible even to people who have no programming knowledge at all), it was a good way to learn about the technical terms used in Japanese for coding (and also the word for arrow keys: 矢印キー).