Good day. Almost all programming languages have online courses, after which you can get a certificate. Is there such a course for the Racket language?
The courses that come to mind are https://www.edx.org/learn/coding/university-of-british-columbia-how-to-code-simple-data and https://www.edx.org/learn/coding/university-of-british-columbia-how-to-code-complex-data, which are part of UBC’s micro-masters in software development. Those are free to audit but you can purchase an upgrade including a certificate at the end. Those two courses are adapted in part from the How to Design Programs textbook. The book introduces you to several languages / dialects starting with Beginning Student up through Advanced Student since Racket base language is pretty large and hard to tackle without good foundations. On Exercism, we use racket-minimal instead of the full Racket distribution so those beginner languages aren’t available and you’ll have to use base Racket.