In general, I tend to look at sites like these for new languages: https://learnxinyminutes.com/docs/crystal/ https://learnxinyminutes.com/docs/crystal/ https:

In general, I tend to look at sites like these for new languages: https://learnxinyminutes.com/docs/crystal/ https://learnxinyminutes.com/docs/crystal/ https://rosettacode.org/wiki/Category:Crystal https://rosettacode.org/wiki/Category:Crystal Otherwise I'll be starting with Crystal as well if I decide to do AoC in it, so I don't know of any other resources either.