You should do well enough starting in #C053AK3F9. Also #C03S1L9DN is generally pretty beginner-friendly. There are people in #C03S1KBA2 who will respond helpfully, but that channel leans more toward discussions between people with a strong grasp of the language and some knowledge of the JVM. If your questions specifically about spec start getting more advanced (or to see what kinds of questions others are asking), you can check out #C1B1BB2Q3, but it's usually pretty quiet there.