Congratulations! You’ve gained some experience with the Crystal compiler, and hopefully you’ve found a favorite editor for Crystal. Or perhaps you’re a Crystal Playground convert. All of these will help you immerse yourself in Crystal code.
https://github.com/crystal-lang/crystal/wiki/All-required-libraries
https://crystal-lang.org/docs/installation/from_source_repository.html
https://marketplace.visualstudio.com/items?itemName=webfreak.debug