Creating a Lisp is a great way to learn a language. <a href="https:&#x2F;&#x2F;github.com&#x2F;kanaka&#x2F;mal&#x2F;" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;kanaka&#x2F;mal&#x2F;</a> has thorough tests and step by step instructions to help you along the way, definitely recommend checking it out.