Hey!
Woodshop orientation is one of the most sought-after classes. The best thing is to watch the calendar like a hawk. If you’re around when a class is starting you can always ask if someone didn’t show and if it would be possible to take their slot- but it depends on who is teaching. The ultimate say is up to the teacher.
As for the CNC, you can watch the calendar or post a separate request for a class. I believe you need to complete orientation first so you have access to the area.
Welcome to Makerspace! (or at least to Talk )